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Flagged figures

Figures the extraction already flagged while reading the video: speaker error (the speaker misstates or corrects a figure), doubtful (implausible, contested or garbled), and the few verified on the spot. This is not an outside fact-check. Back to the overview.

Speaker errors (15)

2007

  • 2007-07-12 · July 12: Pizza, Punishments and Potter — Hank is excited about the next Harry Potter book, which he thinks comes out in 12 or 13 days. — hedged: “I think” (00:01:36)
    • 12 days — time until the book release · as of 2007-07-12 · no source named · speaker error
    • 13 days — time until the book release · as of 2007-07-12 · no source named · speaker error
  • 2007-09-13 · September 13th: HA! I read from MY Novel :-p — Hank remarks that seven years is a long time, referring to the time since September 11th. (00:03:02)
    • Seven years — time elapsed since the September 11 attacks · as of 2007-09-13 · no source named · speaker error

2010

  • 2010-04-19 · I Shall BLOW YOUR MIND — Hank first says Earth's size was unknown until a few centuries ago, then corrects himself: people worked it out long ago with math, though the planet wasn't fully mapped. (00:00:00)
    • a few hundred years ago (years before present) — when the size of the Earth became known (retracted on air) · for humanity · as of 2010 · no source named · speaker error

2012

  • 2012-11-07 · The 51st State — Hank says granting statehood takes not 51% of the vote but two-thirds. (00:02:33)
    • 51% — share of the vote needed to grant statehood (rejected) · in United States · as of 2012-11-07 (implied: date said in the video) · no source named · speaker error
    • two thirds (fraction) — share of the vote needed to grant statehood · in United States · as of 2012-11-07 (implied: date said in the video) · no source named · speaker error

2015

  • 2015-10-23 · Benghazi: Explained — Hank says a pro-democracy protest broke out in Benghazi in 2009, spread across Libya and eventually resulted in the first Libyan Civil War. (00:00:56)
    • 2009 (year) — year the pro-democracy protest broke out in Benghazi · in Benghazi, Libya · as of 2015-10-23 (implied: upload date) · no source named · speaker error

2016

  • 2016-01-01 · Why Does January First Start the New Year? - New Year's Explained — Hank says that in 46 BC Julius Caesar had just become the first emperor of Rome and the Roman calendar was a mess. (00:00:44)
    • 46 B.C. — year of the scene: Caesar newly in power and the calendar a mess · in Rome · as of 2016-01-01 (implied: upload date) · no source named · unchecked
    • first emperor of Rome — Julius Caesar's title · in Rome · as of 2016-01-01 (implied: upload date) · no source named · speaker error
  • 2016-01-05 · Who Owns Oregon? Some Historical Context on the so-called Militia Occupation of Public Lands — John calls Portland Oregon's capital; the description corrects this to Salem. (00:00:29)
    • Portland — capital of Oregon · in Oregon · as of 2016-01-05 (implied: upload date) · no source named · speaker error
  • 2016-10-11 · Understanding Donald Trump and Hillary Clinton's Tax Plans — John walks through the Johnsons' bill: standard deduction, $4,050 personal exemptions for four, about $2,553 owed, minus $1,000 credit per child, leaving $553, an effective rate just over 1%. (00:01:40)
    • $553 (USD per year) — federal income tax paid · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · unchecked
    • just over 1% (percent) — effective federal income tax rate · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · unchecked
    • $12,400 (USD) — federal standard deduction · for married couples filing jointly · in United States · as of 2016 · no source named · speaker error
    • $39,600 (USD) — taxable income after standard deduction · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · doubtful
    • $4,050 (USD per person) — federal personal exemption · for all taxpayers and dependents · in United States · as of 2016 · no source named · unchecked
    • $2,553 (USD) — federal income tax before child tax credits · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · unchecked
    • 1,000 dollar (USD per child) — federal child tax credit · for families with dependent children · in United States · as of 2016 · no source named · unchecked
  • 2016-10-25 · Will the U.S. Presidential Election Be Rigged? — John says if no candidate gets an electoral majority the House chooses the president, as in 1826 when Congress chose John Quincy Adams although Andrew Jackson had more votes. (00:01:02)
    • 1826 (year) — year Congress chose John Quincy Adams as president over Andrew Jackson · in United States · as of 2016-10-25 (implied: upload date) · no source named · speaker error

2017

  • 2017-01-10 · What Is the Real Unemployment Rate? — John says the 38% figure refers to the labor force participation rate, the share of Americans over 18 working or looking for work, which fell over 20 years from over 67% to under 63%. (00:00:36)
    • 38% — figure cited as the 'real' unemployment rate (refers to labor force participation) · in United States · as of 2017-01-10 (implied: upload date) · no source named · unchecked
    • 18 (years) — minimum age counted in the labor force participation rate · for Americans · in United States · as of 2017-01-10 (implied: upload date) · no source named · speaker error
    • over 67% — labor force participation rate, about 20 years ago · for Americans · in United States · as of 2017-01-10 (implied: upload date) · no source named · unchecked
    • under 63% — labor force participation rate, now · for Americans · in United States · as of 2016 · no source named · unchecked

2018

  • 2018-06-15 · Sports are Dumb — For one month every two years the whole world works together to find out who is best at a 'dumb game'. (00:02:53)
    • every two years — frequency of the World Cup · as of 2018-06-15 (implied: upload date) · no source named · speaker error

2022

  • 2022-04-29 · 5 Ways to Actually Understand Very Large Numbers — Hank says that at 70 miles an hour you could drive to the Moon in four years and to the Sun in 150; the scale of difference is what he grasps. (00:01:27)
    • four years — driving time to the Moon at 70 miles an hour · in Earth-Moon · as of 2022-04-29 (implied: upload date) · no source named · speaker error
    • 150 (years) — driving time to the Sun at 70 miles an hour · in Earth-Sun · as of 2022-04-29 (implied: upload date) · no source named · unchecked

2023

  • 2023-05-30 · How Does He Do It? — John says the idea alone did not get Crash Course its 15 million YouTube subscribers (he said 'billion' by mistake and says so in a comment), over 1.8 billion views and a place in many American high schools and colleges. (00:00:43)
    • 15 billion (subscribers) — YouTube subscribers of Crash Course · for Crash Course channel · as of 2023 · no source named · speaker error
    • over 1.8 billion (views) — YouTube views of Crash Course · for Crash Course channel · as of 2023 · no source named · unchecked

2024

  • 2024-08-16 · I Have Uncovered an Olympics Mystery… — Contrasting pole vault (only men and women) with swimming (many strokes and lengths for each), Hank says there are 37 Olympic swimming events and that it is weird the number is odd. (00:03:41)
    • 37 (events) — number of Olympic swimming events · for Olympic Games · as of 2024 · no source named · speaker error

2025

  • 2025-10-21 · Is Book Publishing Dying? An Author's Perspective — John says the single video game Call of Duty Black Ops 6 sold more copies than all books for adults combined in the United States in 2024. (00:00:20)
    • sold more copies than All books for adults combined — copies sold of Call of Duty Black Ops 6 compared with all adult books · for books for adults · in United States · as of 2024 · no source named · speaker error

Doubtful (136)

2007

  • 2007-02-12 · Brotherhood 2.0: February 12th — Hank says alcohol cannot be sold on Sundays in Florida, so he has to buy the wine right away, before the cutoff. (00:02:14)
    • you can't sell alcohol on Sundays — Sunday alcohol sales restriction · for retail alcohol sales · in Florida · as of 2007-02 · no source named · doubtful
  • 2007-03-06 · Brotherhood 2.0: Peeps and Genocide — Hank says 800,000 people were killed in Rwanda in a matter of days. (00:01:40)
    • 800,000 (people) — people killed in the Rwandan genocide · in Rwanda · as of 2007-03-06 (implied: date said in the video) · no source named · unchecked
    • a matter of days — duration of the killing in the Rwandan genocide · in Rwanda · as of 2007-03-06 (implied: date said in the video) · no source named · doubtful
  • 2007-06-28 · June 28: How to Be a Microfinancier — John says about 60% of people in the Dominican Republic live in extreme poverty and about half of those live on less than one dollar a day. (00:00:00)
    • about 60% (percent of people) — share of population in extreme poverty · for people in the Dominican Republic · in Dominican Republic · as of 2007 · no source named · doubtful
    • about half of those (share of the extremely poor) — share of the extremely poor living on less than one dollar a day · for people in extreme poverty in the Dominican Republic · in Dominican Republic · as of 2007 · no source named · unchecked
    • less than one dollar a day (US dollars per day) — income of the poorest · for about half of those in extreme poverty · in Dominican Republic · as of 2007 · no source named · unchecked
  • 2007-09-26 · September 26th: Norbert Wiener — John says Wiener was at Harvard as a child alongside William James Sidis, who was even smarter and lectured in astrophysics at Harvard at 13. (00:01:08)
    • 13 (years (age)) — age at which William James Sidis lectured at Harvard · for William James Sidis · in Harvard · as of 2007-09-26 (implied: date said in the video) · no source named · doubtful
  • 2007-09-26 · September 26th: Norbert Wiener — John says Sidis as an adult turned to railroad traffic signals, spent about 30 years writing an 8,000-page manuscript on them while working as a bookkeeper, and died alone. (00:01:50)
    • like 30 (years) — time William James Sidis spent writing his manuscript on railroad traffic signals · for William James Sidis · as of 2007-09-26 (implied: date said in the video) · no source named · doubtful
    • like 8,000 (pages) — length of William James Sidis's manuscript on railroad traffic signals · for William James Sidis · as of 2007-09-26 (implied: date said in the video) · no source named · doubtful
  • 2007-10-12 · October 12th: Carbon Re-Neutralizing Brotherhood 2.0 — Assuming about three minutes per view, John computes 9,091,111 minutes, over 151,516 hours or 6,313 days: more than 17 years spent watching Brotherhood 2.0. (00:01:33)
    • three minutes — assumed average length watched per video view · as of 2007-10-12 · source: John (assumption) · unchecked
    • 9,091,111 (minutes) — total time spent watching Brotherhood 2.0 · for viewers · as of 2007-10-12 · source: John (calculation) · doubtful
    • more than 151,516 (hours) — total time spent watching Brotherhood 2.0 · for viewers · as of 2007-10-12 · source: John (calculation) · unchecked
    • more than 6,313 (days) — total time spent watching Brotherhood 2.0 · for viewers · as of 2007-10-12 · source: John (calculation) · unchecked
    • more than 17 (years) — total time spent watching Brotherhood 2.0 · for viewers · as of 2007-10-12 · source: John (calculation) · unchecked
  • 2007-10-12 · October 12th: Carbon Re-Neutralizing Brotherhood 2.0 — John says an average computer uses about 0.11 kilowatts to browse the internet, giving 16,966 kilowatts for the vlog's total hours. (00:02:31)
    • about 0.11 (kilowatts per hour (as said)) — power used by an average computer browsing the internet · for average computer · as of 2007-10-12 (implied: date said in the video) · no source named · doubtful
    • 16,966 (kilowatts (as said)) — energy used by Brotherhood 2.0 viewing, commenting and posting · as of 2007-10-12 · source: John (calculation) · doubtful
  • 2007-10-12 · October 12th: Carbon Re-Neutralizing Brotherhood 2.0 — John says producing one kilowatt of energy in the US takes on average 1.35 pounds of carbon, giving 22,905 (units unstated) of carbon for Brotherhood 2.0. (00:02:31)
    • 1.35 (pounds of carbon per kilowatt (as said)) — carbon emitted per unit of electricity generated · in United States · as of 2007-10-12 (implied: date said in the video) · no source named · unchecked
    • 22,905 (unit not stated (pounds implied)) — carbon emitted by Brotherhood 2.0 viewing, commenting and posting · as of 2007-10-12 · source: John (calculation) · doubtful
  • 2007-10-22 · October 22nd: The Anniversary of Young Earth Creationism — John says that in the 17th century Archbishop James Ussher calculated from the Bible that the world was created on October 22, 4004 BC, just after nightfall, making today the universe's 6012th birthday by some accounts. (00:00:00)
    • 4004 BC (year) — date of the creation of the world per Ussher's chronology · as of 17th century · source: James Ussher · unchecked
    • October 22nd, just after nightfall (date) — day of the creation of the world per Ussher's chronology · as of 17th century · source: James Ussher · unchecked
    • 6012th (birthday) — age of the universe on 2007-10-22 per Ussher's chronology · as of 2007-10-22 · source: some people · doubtful
  • 2007-11-07 · November 7: Discussing the Political Situation in Pakistan — John says Musharraf thus became Pakistan's Prime Minister in 1999, just after Pakistan had made itself a nuclear power, which angered America. (00:01:42)
    • 1999 (year) — year Musharraf took power · in Pakistan · as of 2007-11-07 (implied: date said in the video) · no source named · doubtful
  • 2007-11-27 · November 27th: Eagle's Nest, Blogger's Choice and Shopping — Hank says Kenneth P. Green and the American Enterprise Institute are funded entirely by billion-dollar corporations including Exxon, which don't care if we're unhappy as long as we spend. (00:01:45)
    • entirely (share of funding) — share of funding of Kenneth P. Green and the American Enterprise Institute from billion-dollar corporations · as of 2007 · no source named · doubtful

2008

  • 2008-04-28 · Ranting and Giving Stuff Away — John says the drug Hank was given is almost never prescribed in any European country with socialized medicine. (00:03:14)
    • almost never prescribed (prescribing frequency) — how often the drug Hank was given is prescribed · in European countries with socialized medicine · as of 2008 · no source named · doubtful
  • 2008-07-22 · OMFG CATCHER IN THE RYE!!! — John says that soon afterwards Salinger left his wife for a 19-year-old and has not been a particularly good father to his children. (00:00:46)
    • 19 (years (age)) — age of the woman John says Salinger left his wife for · as of 2008-07-22 (implied: upload date) · no source named · doubtful

2009

  • 2009-01-04 · Israel. Gaza. PUPPY! — In 2006 Palestinians held their first really free elections; Fatah, long the most powerful party (said as 'in Pakistan'), lost to Hamas, an internationally recognized terrorist organization. (00:01:30)
    • 2006 (year) — year of the first really free Palestinian elections · for Palestinians · in Palestine · as of 2006 · no source named · unchecked
    • for decades (years) — time Fatah was the most powerful party · in Pakistan (as said) · as of 2006 · no source named · doubtful
  • 2009-03-03 · Eating Man Meat — Hank says 80% of corn, 90% of soy and 70% of wheat are fed to animals that people then eat. (00:01:50)
    • 80% (percent) — share of corn fed to livestock · in United States · as of 2009-03-03 (implied: upload date) · no source named · unchecked
    • 90% (percent) — share of soy fed to livestock · in United States · as of 2009-03-03 (implied: upload date) · no source named · unchecked
    • 70% (percent) — share of wheat fed to livestock · in United States · as of 2009-03-03 (implied: upload date) · no source named · doubtful
  • 2009-03-03 · Eating Man Meat — Hank says a pound of potatoes takes 60 gallons of water while a pound of beef takes 12,000 gallons. (00:02:44)
    • 60 gallons (US gallons per pound) — water used to produce a pound of potatoes · as of 2009-03-03 (implied: upload date) · no source named · unchecked
    • 12,000 gallons (US gallons per pound) — water used to produce a pound of beef · as of 2009-03-03 (implied: upload date) · no source named · doubtful
  • 2009-05-04 · Oinkbarf Pandemic! An Intellectual Response to Swine Flu — John says swine flu (H1N1) first appeared as a flu in Mexico spreading easily between people and killing 10% of its victims, most aged 25 to 45. (00:01:27)
    • 10% (percent of victims) — case fatality rate of the 2009 swine flu · for people infected · in Mexico · as of early news reports, spring 2009 · source: the news · doubtful
    • between 25 and 45 (years of age) — age range of most swine flu deaths · for people killed · in Mexico · as of early news reports, spring 2009 · source: the news · unchecked
  • 2009-05-04 · Oinkbarf Pandemic! An Intellectual Response to Swine Flu — John says the 1918 pandemic also killed people aged 25 to 45 and killed more people than all of World War II. (00:01:34)
    • more people than all of World War II (deaths) — death toll of the 1918 influenza pandemic compared with World War II · for worldwide · as of 1918 · no source named · doubtful
  • 2009-05-17 · Burma! Myanmar? BURMA! — John says the Burmese government responded to the 1988 protests by killing more than 10,000 protesters. (00:01:52)
    • more than 10 000 (people) — protesters killed by the Burmese government · in Burma · as of 1988 · no source named · doubtful
  • 2009-10-22 · The Top 10 Greatest Hoaxes of All Time — Hank recalls a hoax from around 1995 that Mars would look as big as the moon in that night's sky. — hedged: “like 1995” (00:00:29)
    • like 1995 (year) — year of the Mars-as-big-as-the-moon hoax · as of 2009-10-22 (implied: upload date) · no source named · doubtful
  • 2009-10-22 · The Top 10 Greatest Hoaxes of All Time — Hank says that in 1983 a German magazine paid six million dollars for a supposed 60-volume set of Hitler's diaries, forged on modern paper; the forger got 32 months in prison. (00:01:56)
    • 1983 (year) — year the Hitler diaries were bought · in Germany · as of 2009-10-22 (implied: upload date) · no source named · unchecked
    • six million dollars (US dollars) — price a German magazine paid for the Hitler diaries · in Germany · as of 1983 · no source named · unchecked
    • 60 volume — size of the forged Hitler diaries set · as of 1983 · no source named · unchecked
    • 32 months — prison sentence of the Hitler diaries forger · in Germany · as of 2009-10-22 (implied: upload date) · no source named · doubtful
  • 2009-10-22 · The Top 10 Greatest Hoaxes of All Time — Hank calls The War of the Worlds broadcast, which he credits to H. G. Wells, possibly the greatest hoax and probably accidental; listeners believed Martians attacked, and an Ecuadorian rebroadcast killed 20 people. — hedged: “probably” (00:03:12)
    • 20 (people) — deaths resulting from a rebroadcast of The War of the Worlds · in Ecuador · as of 2009-10-22 (implied: upload date) · no source named · doubtful
  • 2009-12-01 · Shaving for Pakistan — John says Pakistan's economy has grown in recent years but per-capita GDP by purchasing power is under $1,000 a year: on average people live on less than $3 a day. (00:01:03)
    • less than a thousand dollars a year (USD per year) — per-capita GDP by purchasing power · for people in Pakistan · in Pakistan · as of 2009-12 · no source named · doubtful
    • less than three dollars a day (USD per day) — average daily income (simplified from per-capita GDP) · for people in Pakistan · in Pakistan · as of 2009-12 · no source named · doubtful
  • 2009-12-16 · Project for Awesome: The Nature Conservancy — Hank sings that 'we' spend a million per year on cosmetic surgery, money that could feed many hungry children. (00:02:51)
    • a million ((unit not said)) — annual spending on cosmetic surgery · as of 2009-12-16 (implied: date said in the video) · no source named · doubtful
  • 2009-12-23 · Amazing Christmas Facts With John and Hank — Hank says Jingle Bells was originally a Thanksgiving song, which is why it never mentions Christmas; a fact check says it was written in 1857 for a Thanksgiving program by James Lord Pierpont. (00:03:18)
    • 1857 (year) — year Jingle Bells was written · as of 2009-12-23 (implied: upload date) · source: on-air fact check · doubtful

2010

  • 2010-01-08 · GUS HAS NO FUZZ! — John cites a 2008 study (linked in the sidebar) that he says shows using a hand dryer after washing leaves far more bacteria on your hands than not washing at all. (00:00:29)
    • way more bacteria on your hands than if you just don't wash them at all — bacteria on hands after hand-dryer use vs no washing · for people using hand dryers · as of 2008 · source: a 2008 study about hand dryers · doubtful
  • 2010-04-09 · Why is the Sky Blue and Other Questions Answered — Hank explains planes stay up because air over the curved top of the wing must travel faster than below, giving low pressure on top and high pressure underneath. (00:03:11)
    • the air across the top has to travel faster than the air on the bottom — airflow over an airplane wing (cause of lift) · as of 2010 · no source named · doubtful
  • 2010-06-21 · You're Gonna Die — John says, unsure and admitting he's not good at science, that in about six billion years the Earth will fall into the sun. — hedged: “or whatever” (00:00:27)
    • about six billion (years) — time until the Earth falls into the Sun · in Earth · as of 2010-06-21 (implied: date said in the video) · source: Orlando Science Center planetarium (as remembered) · doubtful
  • 2010-09-06 · I HATE PENNIES!!!! (Also Nickels.) — John says it costs the US Mint 1.7 cents to make a penny, so every year $70 million of federal tax money subsidizes the penny. (00:00:45)
    • 1.7 cents (US cents) — cost to produce one US penny · in United States · as of 2010 · no source named · doubtful
    • 70 million dollars (USD per year) — annual federal cost of subsidizing the penny · in United States · as of 2010 · no source named · unchecked
  • 2010-09-06 · I HATE PENNIES!!!! (Also Nickels.) — John says a nickel, worth five cents, takes more than nine cents to produce, as if a bank paid nine cents for every nickel. (00:02:18)
    • more than nine cents (US cents) — cost to produce one US nickel · in United States · as of 2010 · no source named · doubtful
  • 2010-09-08 · Where are the Space Aliens?! — Hank says our civilization has been broadcasting ultra-high-frequency broadband signals that can be detected tens of thousands of light years away. (00:00:58)
    • tens of thousands of light years — detection range of humanity's broadcast signals · as of 2010 · no source named · doubtful
  • 2010-11-11 · REIGN OF TERROR: The French Revolution, Part III — John calls the best quote on the French Revolution former Chinese president Zhou Enlai's answer, when asked in the 1960s about its impact, that it was too soon to say. (00:03:44)
    • the 1960s (decade) — when Zhou Enlai was asked about the impact of the French Revolution · in China · as of 2010-11-11 (implied: upload date) · no source named · doubtful
  • 2010-11-12 · Blood!!! — Hank says lung capillaries, on the alveolar sacs, are narrower than the cell; without its nucleus the cell, holding 230 million hemoglobin molecules, can fold to squeeze through. (00:02:26)
    • 230 million (molecules of hemoglobin) — hemoglobin molecules per red blood cell · for one red blood cell · as of 2010-11-12 (implied: upload date) · no source named · doubtful

2011

  • 2011-02-23 · WE ARE 812 YEARS OLD — John says YouTube's carbon emissions amount to trillions of pounds of carbon. (00:02:53)
    • trillions (pounds of carbon) — carbon emissions attributable to YouTube · for YouTube · as of 2011-02 · no source named · doubtful
  • 2011-03-16 · Why Did Fukushima Explode? — Hank says fission splits an atom into lighter atoms; the lost mass becomes energy per a famous equation multiplying by the speed of light squared, so a pound of uranium-235 equals about a million gallons of gasoline. (00:01:15)
    • about a million gallons of gasoline (gallons of gasoline (energy equivalent)) — energy released by converting one pound of uranium-235 · as of 2011-03-16 (implied: upload date) · no source named · doubtful
  • 2011-04-27 · NASA: Increasing Awesome — NASA has identified thousands of planets outside the solar system, many apparently Earth-like with liquid water. — hedged: “apparently” (00:03:03)
    • thousands (planets) — number of planets outside the solar system identified by NASA · as of 2011 · no source named · doubtful
  • 2011-06-03 · I AM A BAD PERSON! — Hank says that if the edible food fed to livestock in the US went to people instead, no one in the world would be hungry. (00:01:14)
    • no one in the world would be hungry — world hunger if edible food fed to livestock in this country went to people · in this country (United States) · as of 2011 · no source named · doubtful
  • 2011-07-06 · John Green is an IDIOT! And so are you. — In an anchoring study, people spun a wheel numbered 15 to 65, then guessed how many countries are in Africa; those who spun 15 guessed near 15, those who spun 65 near 65. (00:02:00)
    • 15 (number (wheel value)) — estimates of the number of countries in Africa by participants who spun 15 ('numbers close to 15') · for participants in an anchoring study · as of 2011-07-06 (implied: upload date) · source: a study on anchoring bias · doubtful
    • 65 (number (wheel value)) — estimates of the number of countries in Africa by participants who spun 65 ('closer to 65') · for participants in an anchoring study · as of 2011-07-06 (implied: upload date) · source: a study on anchoring bias · doubtful
  • 2011-09-28 · Cup Stacking and Glasses Picking — Hank's examples of valuing groups range from several hundred cup stackers to 30 million people watching the Super Bowl. (00:01:29)
    • several hundred (people) — number of cup stackers · for cup stackers · as of 2011-09-28 (implied: upload date) · no source named · unchecked
    • 30 million (people) — audience watching the Super Bowl · for viewers · in United States · as of 2011-09-28 (implied: upload date) · no source named · doubtful

2012

  • 2012-01-06 · Kill your TV — Hank says a 15-second pre-roll on a four-minute YouTube video is seven times less advertising than on television. (00:02:39)
    • 15-second — length of a YouTube pre-roll ad on a four-minute video · for YouTube videos · as of 2012-01-06 (implied: upload date) · no source named · unchecked
    • 7 times less (ratio) — advertising share of a four-minute YouTube video with a 15-second pre-roll versus television · for YouTube vs television · as of 2012-01-06 (implied: upload date) · source: Hank (own calculation) · doubtful
  • 2012-03-09 · The Future of Manned Space Exploration — Hank calls Mars the juiciest scientific fruit in the solar system: a third the size of Earth, with an atmosphere and a day of 24-point-something hours. (00:02:52)
    • a third the size of Earth (fraction of Earth) — size of Mars relative to Earth · as of 2012-03-09 (implied: upload date) · no source named · doubtful
    • 24 point something hour — length of a day on Mars · as of 2012-03-09 (implied: upload date) · no source named · unchecked
  • 2012-05-22 · You ARE The Product — John says Facebook isn't actually worth $100 billion, but whatever it is worth is because of its users; it could 'MySpace' tomorrow and be worth nothing. (00:00:50)
    • a hundred billion dollars (USD) — market valuation of Facebook · for Facebook · as of 2012-05 · source: Hank (quoted), disputed by John · doubtful
  • 2012-10-23 · Understanding the National Debt and Budget Deficit — John says Obama wants a 39% top marginal income tax rate, which was over 50% every year from 1945 to 1986; Romney wants 28.5%, its level in 1989. (00:05:48)
    • 39% (percent) — top marginal income tax rate proposed by Obama · in United States · as of 2012 · no source named · unchecked
    • over 50% (percent) — US top marginal income tax rate · in United States · as of every year 1945-1986 · no source named · doubtful
    • 28.5% (percent) — top marginal income tax rate proposed by Romney · in United States · as of 2012 · no source named · doubtful
    • 28.5% (percent) — US top marginal income tax rate · in United States · as of 1989 · no source named · doubtful
  • 2012-11-02 · Disney Buys Star Wars and DFTVA! — Hank says Lucasfilm's effects studio, Industrial Light and Magic, hired John Lasseter in the early 80s, and he and others created its computer graphics department. (00:00:00)
    • early 80s (decade) — when ILM hired John Lasseter · as of early 1980s · no source named · doubtful
  • 2012-11-04 · Policy and Politics: Brotherhood 2.0 Week Begins — Obama would raise the capital gains rate back to 20%, its level in 1997-2002; Romney would keep 15% but eliminate all tax on capital gains under $250,000. (00:02:26)
    • 20% (percent) — capital gains tax rate proposed by Obama · in United States · as of 2012 proposal · no source named · unchecked
    • 20% (percent) — US capital gains tax rate · in United States · as of 1997-2002 · no source named · unchecked
    • 15% (percent) — capital gains tax rate kept under Romney's plan · in United States · as of 2012 proposal · no source named · unchecked
    • $250,000 (USD) — capital gains below which Romney would eliminate all tax · in United States · as of 2012 proposal · no source named · doubtful
  • 2012-11-07 · The 51st State — But Puerto Rico has 13% unemployment and per capita income two-thirds that of the poorest US state. (00:01:29)
    • thirteen percent (%) — unemployment rate · for labour force · in Puerto Rico · as of 2012 · no source named · unchecked
    • two thirds (ratio) — per capita income relative to the poorest US state · in Puerto Rico · as of 2012 · no source named · doubtful
  • 2012-11-07 · The 51st State — Those representatives would come out of other states' districts rather than be added, cutting their representation, which Hank thinks many states would be upset about. — hedged: “I think” (00:02:13)
    • five (representatives) — House seats that would be taken from other states · in United States · as of 2012-11-07 (implied: date said in the video) · no source named · doubtful
  • 2012-11-20 · Great at Being Terrible: The Florence Foster Jenkins Story — Singing was clearly fulfilling for Jenkins, John says: she sang professionally for about 40 years. (00:02:39)
    • 40 (years) — length of Florence Foster Jenkins' professional singing career · for Florence Foster Jenkins · as of 2012-11-20 (implied: upload date) · no source named · doubtful
  • 2012-11-23 · Black Friday: An Accident of History — Black Friday is billed as the biggest shopping day of the year, but Hank says that is untrue: Americans procrastinate, so Christmas Eve is the biggest. (00:01:30)
    • Christmas Eve (day) — biggest shopping day of the year · for US shoppers · in United States · as of 2012-11-23 (implied: date said in the video) · no source named · doubtful
  • 2012-11-23 · Black Friday: An Accident of History — Hank thanks Jonas Salk for giving away the patent to his polio vaccine so it could be made more cheaply, and Tim Berners-Lee for doing basically the same with the internet. (00:03:04)
    • giving away the patent to his polio vaccine — whether Jonas Salk patented the polio vaccine and gave the patent away · as of 2012-11-23 (implied: date said in the video) · no source named · doubtful

2013

  • 2013-02-01 · Football For Nerds — Hank says high paychecks do not bring financial stability: 78% of football players are broke two years after retirement. (00:03:33)
    • 78% (percent of players) — players broke two years after retirement · for football players · as of 2013-02-01 (implied: upload date) · no source named · doubtful
  • 2013-03-22 · How Much is a Human Life Worth? — Hank says the US government sets the minimum price of an hour of your life at $7.80, and average lifetime wages are about $2 million. (00:00:13)
    • $7.80 (US dollars per hour) — legal minimum wage · for workers · in United States · as of 2013 · source: the government of the United States · doubtful
    • $2 million (US dollars) — average lifetime wages of a person · for people · as of 2013 · no source named · unchecked
  • 2013-04-23 · DOCTOR GREEN — John says that, it seems, a few honorary doctorate holders used the title, including Benjamin Franklin, who called himself Dr. Franklin after a 1758 honorary degree from William and Mary, but that today it is frowned upon. — hedged: “It seems that” (00:01:32)
    • 1758 (year) — year of the honorary degree after which Benjamin Franklin called himself Dr. Franklin · for Benjamin Franklin · in College of William and Mary · as of 2013-04-23 (implied: upload date) · source: Wikipedia · doubtful
  • 2013-05-17 · GIFs, JIFs, Whip Pans, Trivia, and BATMAN! — Hank's research: counting regular watchers Nerdfighteria is bigger than 61 countries (incl. Barbados); counting subscribers, 85 countries (incl. Djibouti, Africa's least populous). (00:00:44)
    • 61 countries — number of countries with smaller population than Nerdfighteria counted by regular watchers · for Nerdfighteria (regular watchers) · in the world · as of 2013 · source: Hank (own research) · unchecked
    • 85 countries — number of countries with smaller population than Nerdfighteria counted by subscribers · for Nerdfighteria (subscribers) · in the world · as of 2013 · source: Hank (own research) · unchecked
    • the smallest population of all countries in Africa (rank) — population rank of Djibouti among African countries · for Djibouti · in Africa · as of 2013 · no source named · doubtful
  • 2013-06-21 · New Channels, New Songs, and Just Plain News — Hank: the Nerdfighteria census results were fascinating (his overview on Hank's channel took 23 minutes); 130,000 people filled it out and 100% of those who started finished. — hedged: “probably” (00:02:53)
    • 130,000 (people) — Nerdfighteria Census 2013 respondents · for Nerdfighteria · as of 2013-06 · source: Nerdfighteria Census · unchecked
    • 100% (percent) — Nerdfighteria Census 2013 completion rate among starters · for Nerdfighteria · as of 2013-06 · source: Nerdfighteria Census · doubtful
  • 2013-07-19 · TFiOS Movie, Bees, Babies, and More! — John says he learned that China's monopoly on the world silk trade ended when two monks smuggled about seven silkworms out of China to the Byzantine Empire, rewriting history. — hedged: “like seven silkworms or something” (00:02:40)
    • two (monks) — people who smuggled silkworms out of China · in China to the Byzantine Empire · as of 2013-07-19 (implied: date said in the video) · no source named · unchecked
    • seven (silkworms) — silkworms smuggled out of China · in China to the Byzantine Empire · as of 2013-07-19 (implied: date said in the video) · no source named · doubtful
  • 2013-08-02 · 17 Air Travel Tips — First-class passengers look unhappy because they mostly got their seats not by paying but by travelling about 200 days a year, which Hank calls no way to live. (00:02:22)
    • two hundred (days per year) — days travelled per year by first-class (upgraded frequent) flyers · for first-class passengers · as of 2013-08-02 (implied: date said in the video) · no source named · doubtful
  • 2013-10-25 · When Was it a Million Seconds Ago? — A trillion seconds ago was 31,000 years ago, when, Hank says, humans were first arriving in Europe. (00:01:18)
    • 31 thousand years ago — point in time one trillion seconds before the video · as of 2013-10 · no source named · unchecked
    • 31 thousand years ago — time when humans first arrived in Europe · for humans · in Europe · as of 2013-10-25 (implied: upload date) · no source named · doubtful
  • 2013-11-01 · Scarier than Gravity: Real Life Close Calls in Space — A separation failure turned Soyuz 18A's rocket toward the ground; Hank gives the crew's g-force as '021Gs', about three Gs from lethal, before the abort sequence fired. (00:01:56)
    • 021Gs — peak g-force on the Soyuz 18A crew · as of 2013-11-01 (implied: upload date) · no source named · doubtful
    • three Gs away from lethal — margin between the Soyuz 18A g-force and a lethal g-force · as of 2013-11-01 (implied: upload date) · no source named · unchecked
  • 2013-12-27 · The Kidney That Was In 3 People - And Other Amazing Science Things — Hank says sperm whales dive from the surface to about 2,000 feet, roughly 200 atmospheres of pressure difference, though deep-sea fish explode when raised and surface fish get crushed. (00:01:27)
    • 2,000 feet — depth sperm whales dive to · for sperm whales · as of 2013-12-27 (implied: upload date) · source: Hank · unchecked
    • 200 atmospheres — pressure difference between the surface and a sperm whale dive depth · for sperm whales · as of 2013-12-27 (implied: upload date) · source: Hank · doubtful
  • 2013-12-27 · The Kidney That Was In 3 People - And Other Amazing Science Things — Hank says no one knows whether Jupiter's very hot, high-pressure core is liquid or solid, and that if Jupiter were ten times bigger it would sustain fusion and we would live in a binary star system. (00:02:35)
    • ten times (factor) — how much bigger Jupiter would need to be to sustain fusion · in Jupiter · as of 2013-12-27 (implied: upload date) · source: Hank · doubtful

2014

  • 2014-02-14 · Happy Third Chocolate Day! — Hank says more than fifty million tons of chocolate are consumed on Valentine's Day. (00:00:14)
    • more than fifty million (tons) — chocolate consumed on Valentine's Day · in United States · as of 2014 · no source named · doubtful
  • 2014-02-25 · John and Chris Meet in the Middle — John marvels that he is right in the middle of Indianapolis, a city of one million people, and yet it is just forest. (00:01:33)
    • one million (people) — population · for residents · in Indianapolis · as of 2014 · no source named · doubtful
  • 2014-03-04 · Understanding Ukraine: The Problems Today and Some Historical Context — John says that after Ukraine joined the USSR, as many as 10 million Ukrainians starved in 1932-33 because of Stalin's 'stupid' and 'actively evil' agricultural policies, in what is now the world's third-largest grain exporter. (00:01:10)
    • As many as 10 million (people) — deaths in the 1932-1933 famine · for Ukrainians · in Ukraine · as of 1933 · no source named · doubtful
    • third largest (rank) — grain exporter rank · in Ukraine · as of 2014 · no source named · unchecked
  • 2014-03-21 · The Great Goose Migration — Hank says daylight saving time was created for farmers. (00:02:13)
    • for farmers — intended beneficiaries of daylight saving time · as of 2014-03-21 (implied: date said in the video) · no source named · doubtful
  • 2014-04-01 · VELOCIRAPTORS — John says velociraptors could jump about ten feet high and had retractable sickle-shaped claws on their hind legs to stab prey. (00:02:31)
    • ten feet — Velociraptor vertical jump height · as of 2014-04-01 (implied: date said in the video) · no source named · doubtful
  • 2014-05-16 · The Myth of Greatness — For perspective, Hank says Missoula packs its 70,000 people into 2,600 square miles, while Manhattan has 22 times more people in 78 times less area. (00:00:19)
    • 2600 (square miles) — land area · in Missoula, Montana · as of 2014 · no source named · doubtful
    • 22 times more (ratio) — population of Manhattan relative to Missoula · in Manhattan; Missoula, Montana · as of 2014 · no source named · unchecked
    • 78 times less (ratio) — area of Manhattan relative to Missoula · in Manhattan; Missoula, Montana · as of 2014 · no source named · unchecked
  • 2014-05-16 · The Myth of Greatness — Hank says Manhattan's 1.3 million people are among the richest, most powerful and most influential on the planet, with economic and cultural creation on the scale of Renaissance Italy. (00:00:32)
    • 1.3 million (people) — population · for residents · in Manhattan · as of 2014 · no source named · doubtful
  • 2014-05-23 · My Freakish Talent — Some words mean the opposite of themselves, Hank says: inflammable means both very easy and very hard to catch on fire; sanguine means both cheerful and bloodthirsty. (00:01:16)
    • both very easy to catch on fire and very hard to catch on fire (meaning) — meaning of the word inflammable · as of 2014-05-23 (implied: date said in the video) · no source named · doubtful
  • 2014-07-15 · Exciting Announcements and Mosquito-Borne Illnesses — John says Behind the Beautiful Forevers won the Pulitzer Prize. (00:02:45)
    • the Pulitzer Prize (award) — award won by Behind the Beautiful Forevers · as of 2014-07 · source: John Green · doubtful
  • 2014-08-08 · Who Owns a Monkey's Selfie? And a Song About Meningitis! — The description says a photographer is suing the Wikimedia Foundation for treating his photograph as public domain, and only a judge can decide who is correct. (video description)
    • is suing (legal action) — status of the photographer's legal action against the Wikimedia Foundation over the photo · as of 2014-08 · no source named · doubtful
  • 2014-10-03 · Hong Kong Protests Explained — Hank says that in 1847 Hong Kong, a sparsely populated island off southern China, was ceded to the United Kingdom after the Opium War. (00:00:21)
    • 1847 (year) — year Hong Kong was ceded to the United Kingdom · in Hong Kong · as of 2014-10-03 (implied: upload date) · source: Hank Green · doubtful
  • 2014-11-13 · The History of Pizza and the History of John: Pizzamas Day 4 — John: the exchange between the Americas and the rest of the world that began with Columbus in the late 15th century was disastrous for life on Earth in many ways, but made pizza and about 90% of today's foods possible. (00:01:10)
    • late fifteenth century — start of the exchange between the Americas and the rest of the world · in Americas / Old World · as of 2014-11-13 (implied: upload date) · no source named · unchecked
    • 90% (percent) — share of the foods eaten today made possible by the Columbian exchange · for foods that we now eat · as of 2014 · no source named · doubtful
  • 2014-11-13 · The History of Pizza and the History of John: Pizzamas Day 4 — John: by the middle of the 16th century in Naples, Italy, there was pizza as we know it, with cheese, tomato sauce and bread. (00:01:44)
    • middle of the sixteenth century — date of pizza with cheese, tomato sauce and bread · in Naples, Italy · as of 2014-11-13 (implied: upload date) · no source named · doubtful

2015

  • 2015-01-09 · 14 Fart Facts for my Flatulent Friends — Hank says Benjamin Franklin wrote a letter to the Royal Society, 'Fart Proudly', calling for a prize for a scientist who could make farts smell good. (00:00:43)
    • Royal Society — addressee of Benjamin Franklin's 'Fart Proudly' letter · as of 2015-01-09 (implied: upload date) · source: Hank · doubtful
  • 2015-02-03 · Beards, Birds, and the Paper Towns Release Date: Question Tuesday! — John says it takes between 150 and 500 licks to get to the center of a Tootsie Pop, and that there are studies about this (links in the description). (00:01:11)
    • Between 150 and 500 (licks) — licks needed to reach the center of a Tootsie Pop · as of 2015-01-30 (implied: date said in the video) · source: studies linked in the description · doubtful
  • 2015-02-10 · Understanding Boko Haram — John says Nigeria is Africa's last nation with polio, found only in the north, and that its life expectancy of 52 is lower than Somalia's, which he says has no government. (00:02:35)
    • the last nation in Africa (rank) — African countries where polio is still found · in Nigeria (north only) · as of 2015 · no source named · unchecked
    • 52 (years) — life expectancy · in Nigeria · as of 2015 · no source named · unchecked
    • lower than it is in Somalia (comparison) — life expectancy, Nigeria vs Somalia · in Nigeria; Somalia · as of 2015 · no source named · unchecked
    • doesn't even have a government (state) — existence of a government in Somalia · in Somalia · as of 2015 · no source named · doubtful
  • 2015-02-10 · Understanding Boko Haram — John says that in much of northern Nigeria fewer than half of children attend elementary school, and gives a female (il)literacy figure of over 50% (the two sources disagree on the word). (00:02:46)
    • fewer than half (share of children) — elementary school attendance · for children · in much of northern Nigeria · as of 2015 · no source named · unchecked
    • over 50% (percent) — female literacy · for women · in northern Nigeria · as of 2015 · no source named · doubtful
  • 2015-02-13 · Draw My Life + 16 Other Suggestions — Hank says the tar sands are the second biggest carbon sink in the world, and that turning them into usable oil takes so much energy it releases a ton of CO2 before burning. (00:02:06)
    • second biggest (rank) — size of the tar sands as a carbon sink among the world's carbon sinks · in Alberta tar sands · as of 2015 · no source named · doubtful
  • 2015-03-27 · Announcing NerdCon: Stories — Hank says many organisms excel at one thing: giraffes are tall, cheetahs and antelope fast, and some methanogens (he says eukaryotes) thrive in boiling water. (00:00:25)
    • some methanogen eukaryotes (organisms) — organisms that thrive in boiling water · as of 2015-03-27 (implied: date said in the video) · no source named · doubtful
  • 2015-05-01 · A $100,000 Egg and A 200M Year Old Pinecone — Emily Graslie: Emily says a tapeworm's sexual reproductive organs are all in its head, so breaking off a segment does not stop it reproducing; you have to get the head out. (00:00:48)
    • all of the sexual reproductive organs are located in the head — location of a tapeworm's reproductive organs · for tapeworms · as of 2015-05-01 · no source named · doubtful
  • 2015-06-08 · Monday Bonus Video! — Pointing to a graph, John says that since World War II wages and productivity were closely correlated until about 2000, when they decoupled: productivity surged while wages stayed stagnant. (00:01:49)
    • about 2000 (year) — year US wages and productivity decoupled · in United States · as of 2015-06-08 (implied: upload date) · source: graph shown on screen · doubtful
    • World War II (period) — start of the period of close wage-productivity correlation · in United States · as of 2015-06-08 (implied: upload date) · no source named · unchecked
  • 2015-07-03 · Thoughts from Yachts — The description says Hank has more money than 50% of Americans just by not having any debt. (video description)
    • 50% (percent) — share of Americans with less money (net worth) than a person with no debt · for Americans · in United States · as of 2015 · no source named · doubtful
  • 2015-07-10 · How to Get to Pluto: From a Waterpark — New Horizons is over 4.5 billion km away; it left Earth's orbit faster than any object before, got a speed boost from Jupiter, and cannot slow down, so it will fly past Pluto into the Kuiper belt. (00:02:16)
    • more than 4.5 billion kilometers — distance of New Horizons from Earth · as of 2015-07 · no source named · doubtful
  • 2015-08-28 · ALL of Wikipedia in One QR Code? — Hank says just the text of just the English Wikipedia is about 24 terabytes, 24 trillion bytes. (00:00:42)
    • about 24 terabytes (TB) — size of the text of English Wikipedia · as of 2015 · no source named · doubtful
    • 24 trillion (bytes) — size of the text of English Wikipedia · as of 2015 · no source named · doubtful
  • 2015-09-01 · The Road Less Traveled By — Though too old to be expected to enlist, Thomas 'took the road less traveled', joined the British army to fight in World War I, and was shot through the chest and killed. (00:01:19)
    • shot through the chest — cause of Edward Thomas's death · as of World War I · no source named · doubtful
  • 2015-09-25 · Pissed Off for a Better World — Hank wants to be angry that children are dying, that gender inequality exists nearly everywhere, and that 6 million people will die this year (2015) without access to clean water. (00:00:46)
    • 6 million (deaths) — deaths in one year from lack of access to clean water · for world population · in the world · as of 2015 · no source named · doubtful
  • 2015-10-23 · Benghazi: Explained — Hank says that, close to the 2012 election, Obama didn't want to talk about letting a terrorist attack happen and waited weeks before using the word 'terrorist'. (00:03:58)
    • weeks (time) — time before Obama used the word terrorist about the Benghazi attack · in United States · as of 2012 · no source named · doubtful
  • 2015-12-04 · The Explain The 2008 Financial Crisis CHALLENGE! (and 7 other challenges) — Hank says interest rates in 2008 were super low, so banks could borrow almost free and needed things to buy; the key new purchase was mortgages, of which there were more than $13 trillion. (00:00:10)
    • super low — interest rates · as of 2008 · no source named · doubtful
    • more than thirteen trillion dollars (US dollars) — total value of mortgages · as of 2008 · no source named · unchecked

2016

  • 2016-01-01 · Why Does January First Start the New Year? - New Year's Explained — Hank says Numa Pompilius, an early king of Rome, added January and February at the start of the year in the 700s BC, making January 1 the Roman New Year. (00:01:16)
    • 700's BC — date Numa Pompilius added January and February and January 1 became the Roman New Year · in Rome · as of 2016-01-01 (implied: upload date) · no source named · doubtful
    • two new months — months added by Numa Pompilius · in Rome · as of 2016-01-01 (implied: upload date) · no source named · unchecked
  • 2016-02-02 · Is the Gender Pay Gap Real? — John says even the conservative end of the 4-8% gap means women lose over 241 million dollars of pay every year to direct discrimination. (00:01:42)
    • over 241 million dollars (USD) — annual pay women lose to direct discrimination · for women workers · in United States · as of 2016-02-02 (implied: upload date) · no source named · doubtful
  • 2016-07-12 · Our Capacity for Wonder: A Review — John says that within decades of Gatsby humans glimpsed the universe just after the Big Bang by looking at 16-billion-year-old light. (00:00:58)
    • 16 billion (years) — age of the oldest observed light · for light from just after the Big Bang · in universe · as of 2016-07-12 (implied: upload date) · no source named · doubtful
  • 2016-07-19 · Pretty Bad Ways to Start a Conversation — John admits he does this too: he tweeted that 40% of US gun sales involve no background checks, a totally unsupported statistic, spreading misinformation before checking. (00:01:48)
    • 40% — share of gun sales involving no background checks · for US gun sales · in United States · as of 2016-07-19 (implied: upload date) · source: John's tweet · doubtful
  • 2016-08-16 · Some Good News: 16 Ways 2016 Is Not a Total Dumpster Fire — John says the Ebola outbreak that killed more than 11,000 people in Guinea, Sierra Leone and Liberia has ended, though flare-ups remain possible. (00:00:35)
    • more than 11,000 (deaths) — deaths in the West African Ebola outbreak · in Guinea, Sierra Leone and Liberia · as of 2016 · no source named · doubtful
  • 2016-10-11 · Understanding Donald Trump and Hillary Clinton's Tax Plans — John walks through the Johnsons' bill: standard deduction, $4,050 personal exemptions for four, about $2,553 owed, minus $1,000 credit per child, leaving $553, an effective rate just over 1%. (00:01:40)
    • $553 (USD per year) — federal income tax paid · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · unchecked
    • just over 1% (percent) — effective federal income tax rate · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · unchecked
    • $12,400 (USD) — federal standard deduction · for married couples filing jointly · in United States · as of 2016 · no source named · speaker error
    • $39,600 (USD) — taxable income after standard deduction · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · doubtful
    • $4,050 (USD per person) — federal personal exemption · for all taxpayers and dependents · in United States · as of 2016 · no source named · unchecked
    • $2,553 (USD) — federal income tax before child tax credits · for married couple with two children earning $52,000 (hypothetical) · in United States · as of 2016 · no source named · unchecked
    • 1,000 dollar (USD per child) — federal child tax credit · for families with dependent children · in United States · as of 2016 · no source named · unchecked
  • 2016-10-11 · Understanding Donald Trump and Hillary Clinton's Tax Plans — John says Trump's new tax plan is quite different from the one released in June that he discussed in an earlier video; at the debate Trump promised big tax cuts for the middle class. (00:05:13)
    • June (month) — release date of Trump's earlier tax plan · in United States · as of 2016-10-11 (implied: date said in the video) · no source named · doubtful

2017

  • 2017-01-31 · Understanding Trump's Executive Order on Immigration — Most refugees resettled in the US in 2015 were Burmese, not Syrian. (00:04:46)
    • most — share of refugees resettled in the US who were Burmese · for refugees resettled in the US · in United States · as of 2015 · no source named · doubtful
  • 2017-03-17 · Trump's Budget Explained — Hank says the EPA loses 2.5 blocks, 30% of its budget, the hardest hit of any agency by percent; 3,200 jobs and 50 agencies would go, plus Clean Power Plan funding. (00:02:58)
    • 2.5 (billion USD) — proposed cut to EPA budget · in United States · as of 2017 · no source named · unchecked
    • 30% (percent) — proposed cut to EPA budget as share of its budget · in United States · as of 2017 · no source named · unchecked
    • 3,200 (jobs) — EPA jobs eliminated under the proposal · in United States · as of 2017 · no source named · unchecked
    • 50 (agencies) — EPA agencies eliminated under the proposal · in United States · as of 2017 · no source named · doubtful
  • 2017-06-02 · The Paris Accord: What is it? And What Does it All Mean? — Hank explains that CO2 locked in fossil fuels is being re-released; it lets visible light through but traps infrared, adding energy to atmosphere and oceans and changing the climate. (00:01:03)
    • billions of years — time CO2 was locked up in fossil fuels · as of 2017-06-02 (implied: upload date) · no source named · doubtful
  • 2017-06-02 · The Paris Accord: What is it? And What Does it All Mean? — Hank says in 2015, 270 countries met in Paris with the goal of keeping average warming below 2 degrees Celsius, since otherwise it would be really bad for everyone. (00:01:42)
    • 270 (countries) — countries meeting in Paris for the climate agreement · in Paris · as of 2015 · no source named · doubtful
    • 2 degrees Celsius (degrees_C) — target ceiling for average global warming · for Earth · as of 2015 · no source named · unchecked
  • 2017-06-27 · UNBOXING — Each publisher has its own ISBN prefix: 0-06 is HarperCollins, 0-316 Little, Brown, and 1-224 the University of Chicago Press. (00:01:45)
    • 0-06 — ISBN publisher prefix · for HarperCollins · as of 2017-06-27 (implied: upload date) · no source named · unchecked
    • 0-316 — ISBN publisher prefix · for Little, Brown · as of 2017-06-27 (implied: upload date) · no source named · unchecked
    • 1-224 — ISBN publisher prefix · for University of Chicago Press · as of 2017-06-27 (implied: upload date) · no source named · doubtful

2018

  • 2018-10-23 · Why Are Humans Suddenly Getting Better at Tetris? — Oddly, far fewer people played NES Tetris in 2008 than in 1990, when hundreds of millions were trying to reach level 30, though a larger player base should mean higher top scores. (00:00:58)
    • hundreds of millions (people) — people trying to reach level 30 in NES Tetris · for NES Tetris players · in the world · as of 1990 · no source named · doubtful
  • 2018-10-26 · The Rigged Election — Even after winning, Trump said he lost the popular vote only because millions of undocumented immigrants voted; Hank calls it lies told because they sounded good. (00:01:31)
    • millions (people) — undocumented immigrants said to have voted in the 2016 election · for undocumented immigrants · in United States · as of 2016 · source: Donald Trump · doubtful
  • 2018-12-14 · Cute Goth Shock Collar Trivia Punishment for Charity — Asked how many nautical miles a league equals at sea, Hank answers twelve. (00:03:26)
    • Twelve (nautical miles) — length of a league at sea · as of 2018-12-14 (implied: upload date) · no source named · doubtful

2019

  • 2019-06-21 · How to Lie While Telling the Truth — Hank says Tesla's quarterly safety reports, which are extremely limited, show one accident per 2.87 million Autopilot miles and one per 1.76 non-Autopilot miles. (00:01:01)
    • 2.87 million (miles) — miles driven per accident with Autopilot engaged · for Tesla cars · as of 2019-06-21 (implied: upload date) · source: Tesla, Inc. · unchecked
    • 1.76 (miles) — miles driven per accident without Autopilot · for Tesla cars · as of 2019-06-21 (implied: upload date) · source: Tesla, Inc. · doubtful
  • 2019-08-30 · The Earth Shouldn't Have Oxygen — The description says a balanced carbon cycle makes as much CO2 as O2, yet the atmosphere holds 209,460 ppm of oxygen and only 440 ppm of CO2, up from a recent baseline of 275. (video description)
    • 209,460 (ppm) — oxygen concentration in the atmosphere · in Earth · as of 2019-08-30 (implied: upload date) · no source named · unchecked
    • 440 (ppm) — carbon dioxide concentration in the atmosphere · in Earth · as of 2019-08-30 (implied: upload date) · no source named · doubtful
    • 275 (ppm) — recent baseline carbon dioxide concentration in the atmosphere · in Earth · as of 2019-08-30 (implied: upload date) · no source named · unchecked

2020

  • 2020-08-28 · Break the Mold — Hank says about a month earlier Twitter had a hack that exposed all of its users' direct messages to hackers, which he calls about as bad as it gets. (00:00:58)
    • all of the direct messages of all of its users — users whose direct messages were exposed in the Twitter hack · for Twitter users · as of 2020-07 · no source named · doubtful
  • 2020-09-18 · They Say it Gets Colder — Hank says highs on Venus are about 900 degrees Celsius, hot enough to melt lead. (00:00:58)
    • 900 degrees Celsius (°C) — high surface temperature · in Venus · as of 2020-09-18 (implied: upload date) · no source named · doubtful

2021

  • 2021-10-12 · Fine, I'll take the bait. — For 99% of history people knew pi only as 3.1-something; about 2,000 years ago Chinese mathematicians reached the seventh digit, and 1,400 years later Jamshid al-Kashi about the 15th. (00:00:58)
    • the seventh digit — digits of pi calculated · for mathematicians in China · in China · as of around 2000 years ago · no source named · doubtful
    • about the 15th digit — digits of pi calculated · for Jamshid al-Kashi · in Persia · as of 1400 years later · no source named · unchecked

2022

  • 2022-01-18 · The Miracle of the Leone Stars — John says Africa's best men's national teams meet every four years in the African Cup of Nations; Sierra Leone had not qualified in 26 years, and the Leone Stars rank 108th in FIFA's rankings. (00:00:29)
    • every four years — frequency of the African Cup of Nations · for men's national teams · in Africa · as of 2022-01-18 (implied: upload date) · no source named · doubtful
    • 26 (years) — time since Sierra Leone last qualified for the African Cup of Nations · for Sierra Leone national football team · as of 2022-01-18 (implied: upload date) · no source named · unchecked
    • 108 — FIFA national ranking · for Sierra Leone national football team · as of 2022-01-18 (implied: upload date) · no source named · unchecked
  • 2022-02-25 · When You Can't Fix Everything… — Partners In Health employs over 17,000 doctors in 11 countries, working on everything from cancer treatment to preventing malnutrition. (00:01:37)
    • over 17,000 — doctors employed by Partners In Health · for Partners In Health · in worldwide · as of 2022 · no source named · doubtful
    • 11 — countries where Partners In Health operates · for Partners In Health · in worldwide · as of 2022 · no source named · unchecked
  • 2022-06-17 · Are You Eating a Credit Card Every Week? — Hank says scientists at the Medical University of Vienna, misled, used only the five-gram upper bound of the 0.1-to-5-gram estimate as a background stat in their paper's introduction. (00:01:27)
    • 0.1 grams to five grams — plastic ingested per person per week (estimated range) · for people · as of 2022-06-17 (implied: upload date) · source: University of Newcastle review · unchecked
    • five grams — plastic ingested per person per week (as cited) · for people · as of 2022-06-17 (implied: upload date) · source: Medical University of Vienna paper · doubtful
  • 2022-06-17 · Are You Eating a Credit Card Every Week? — Hank says the university PR team's press release opened by stating that five grams of plastic particles on average enter the human gut per person per week. (00:01:56)
    • five grams — plastic particles entering the human gastrointestinal tract per person per week · for people · as of 2022-06-17 (implied: upload date) · source: university press release · doubtful
  • 2022-08-26 · I Searched for 'Science Side of Twitter' and Answered As Many Questions as I Could — The giant 'quasar-looking' object in a James Webb image is just a star in our galaxy, far closer than the background galaxies; very bright objects show diffraction spikes caused by the shape of the mirrors. (00:00:58)
    • billions of miles — distance of background galaxies in the image · for galaxies in a James Webb image · as of 2022-08-26 (implied: upload date) · no source named · doubtful
    • millions of times closer — how much closer the star is than the background galaxies · for star in our galaxy · as of 2022-08-26 (implied: upload date) · no source named · doubtful
  • 2022-11-15 · 3 Years In: What Happened, Why, and What's Next — John says a stronger health system earns more trust and use: Sewafe's primary health centre saw 4,700 visits in 2019 and, as said, 4,700 in 2020. (00:05:21)
    • 4700 — visits to the primary health centre · for patients · in Sewafe · as of 2019 · no source named · unchecked
    • 4700 — visits to the primary health centre · for patients · in Sewafe · as of 2020 · no source named · doubtful

2023

  • 2023-01-03 · TAKE IT DOWN A NOTCH — John says Booklist had come out for 104 consecutive years, so it would probably come out regardless. (00:02:26)
    • 104 (years) — consecutive years of Booklist publication · for Booklist magazine · as of 2023-01-03 (implied: upload date) · no source named · doubtful
  • 2023-03-10 · Is it Good or Bad that we Haven't Met Aliens? — Hank says there are a hundred million stars in our galaxy and most of them seem to have solar systems. — hedged: “it seems like” (00:00:02)
    • a hundred million (stars) — number of stars · for stars · in Milky Way · as of 2023-03-10 (implied: upload date) · no source named · doubtful
  • 2023-06-30 · Bon Your Vivant — The brothers note they forgot to ask viewers to like or subscribe for the last seven years and have been between three and four million subscribers for about twelve years. (00:00:21)
    • three and four million (subscribers) — Vlogbrothers subscriber count · for Vlogbrothers channel · as of 2023-06-30 (implied: upload date) · no source named · doubtful
    • twelve years — time spent between three and four million subscribers · for Vlogbrothers channel · as of 2023-06-30 (implied: upload date) · no source named · doubtful
  • 2023-09-28 · What the Heck is the UN? — Hank says the International Court of Justice settles legal disputes between countries and prosecutes international law, including trying war criminals. (00:04:18)
    • prosecutes international law — functions of the International Court of Justice · as of 2023-09-28 (implied: upload date) · no source named · doubtful
  • 2023-09-30 · An Incredible Update — John reports that today J&J announced it will not enforce its secondary bedaquiline patents in any of the 143 low- and middle-income countries. (00:01:27)
    • 143 (countries) — low- and middle-income countries where J&J will not enforce secondary bedaquiline patents · as of 2023-09-30 (implied: upload date) · no source named · doubtful
  • 2023-10-04 · A Messy and Unhinged Introduction to Geoengineering — Hank says the cost of solar, wind and batteries has fallen about a thousand times since he graduated college, and they are already better than fossil fuel infrastructure in most ways. — hedged: “like” (00:05:54)
    • thousand times — fall in the cost of solar, wind and batteries since Hank graduated from college · for solar, wind and battery technology · in the world · as of 2023-10-04 (implied: upload date) · no source named · doubtful

2024

  • 2024-10-03 · Broadly in Favor of Humans — On that calendar, John says humans become the only hominid when Neanderthals go extinct in November, and Julius Caesar becomes emperor of the Roman Empire on December 28. (00:01:10)
    • November — Neanderthal extinction on the human-history calendar · for Neanderthals · as of 2024-10-03 (implied: upload date) · no source named · unchecked
    • December 28th — Julius Caesar becoming emperor on the human-history calendar · for Roman Empire · as of 2024-10-03 (implied: upload date) · no source named · doubtful
  • 2024-11-22 · Populism, Media Revolutions, and Our Terrible Moment — Hank says witches were long the populist target, with hundreds of thousands murdered, yet now witches are an adorable folksy thing in our culture. (00:30:23)
    • hundreds of thousands — people murdered as witches · as of 2024-11-22 (implied: upload date) · no source named · doubtful
  • 2024-12-06 · One of the Most Important Images On Earth — Hank says modern humans only reached Spain 20,000 years ago, then corrects himself: there were people in Spain 60,000 years ago, just not humans but Neanderthals. (00:01:01)
    • 20,000 years ago — time of arrival of modern humans · for modern humans · in Spain · as of 2024-12-06 (implied: upload date) · no source named · doubtful
  • 2024-12-06 · One of the Most Important Images On Earth — Hank says DNA from a bone fragment of a person born around 50,000 years ago was exactly half Neanderthal and half Denisovan: a first-generation hybrid of two non-human species. (00:02:07)
    • around 50,000 years ago — birth date of a Neanderthal-Denisovan first-generation hybrid · for one individual known from a bone fragment · as of 2024-12-06 (implied: upload date) · no source named · doubtful
    • exactly half — share of Neanderthal DNA in the hybrid's genome · for one individual known from a bone fragment · as of 2024-12-06 (implied: upload date) · no source named · unchecked

2025

  • 2025-01-21 · Do Audiobooks Count As Reading? — John says a lot of research indicates most people retain information better from audiobooks than from printed books, so audio is the ideal way for many to read. (00:02:17)
    • most people — share of people who retain information better from audiobooks than from print · for people · as of 2025-01-21 (implied: upload date) · no source named · doubtful
  • 2025-03-07 · How Social Security Fraud Actually Works — Hank says a 2023 audit by the Social Security Administration's inspector general found tens of millions of people over 100 in its database; it was public but not a big news story, and today's national debate rests on it. (00:03:53)
    • tens of millions — people over 100 years old in the Social Security database · for people in the Social Security database · in United States · as of 2023 · source: Social Security Administration · doubtful
  • 2025-03-21 · The Second Most Important Book in Dublin — Hank says the Book of Kells lost its jeweled cover in a Viking raid, lay in a bog for three months before recovery, survived, and can be seen in Dublin. (00:00:00)
    • three months — time the Book of Kells lay in a bog before it was recovered · for Book of Kells · in Ireland · as of 2025-03-21 (implied: upload date) · no source named · doubtful
  • 2025-04-11 · How Actually Crazy is This Mess? — Hank says Vietnam got the highest average tariff, 90%, though it is not a major high-tech or strategic competitor. (00:04:58)
    • 90% — tariff on Vietnam · in Vietnam · as of 2025-04-10 (implied: date said in the video) · no source named · doubtful
  • 2025-04-11 · How Actually Crazy is This Mess? — Hank says Congress's taxing power is in the Constitution's second article, not an amendment. (00:17:43)
    • second article — article of the US Constitution giving Congress the power to levy taxes · in United States · as of 2025-04-10 (implied: date said in the video) · no source named · doubtful
  • 2025-04-15 · Chatting with ... a U.S. Senator? — John says TB deaths have fallen by 50% in the last 25 years, and finds it tragic that 15 years of progress will be walked back in the next year. (00:20:36)
    • 50% — change in tuberculosis deaths over the last 25 years · for people worldwide · in the world · as of 2025-04-15 (implied: upload date) · no source named · doubtful
    • 15 years — years of progress against tuberculosis to be lost in the next year · for people worldwide · in the world · as of 2025-04-15 (implied: upload date) · no source named · unchecked
  • 2025-05-02 · I Found the Dumbest Time Zone — Hank says UTC+13 and UTC+14 were made up, UTC+14 in 1992, because Kiribati spanned the international date line and was tired of half the country being in a different day. (00:05:31)
    • 1992 — year the UTC+14 time zone was created · in Kiribati · as of 2025-05-02 (implied: upload date) · no source named · doubtful
  • 2025-10-24 · What Will Books Become? — Hank says, he thinks, that the longest ancient scroll is about 24 feet long. — hedged: “I think I looked this up” (00:00:58)
    • 24 feet — length of the longest ancient scroll · for ancient scrolls · as of 2025-10-24 (implied: upload date) · no source named · doubtful
  • 2025-11-25 · Poverty Is Expensive — John says it is impossible for Henry and Isatu to visit him in the US because the Trump administration has imposed a total travel ban on people from Sierra Leone. (00:02:26)
    • total — scope of US travel ban · for people from Sierra Leone · in United States · as of 2025-11-25 (implied: upload date) · no source named · doubtful

2026

  • 2026-02-20 · What We Actually Did. — Hank says a Good Good Good headline claiming the brothers gave $50 million for the first NICU in Sierra Leone is wrong. (00:01:56)
    • $50 million (USD) — amount the brothers gave for the first NICU (as headlined) · for John and Hank Green · in Sierra Leone · as of 2026-02-20 (implied: upload date) · source: Good Good Good · doubtful
  • 2026-10-05 · Why Are We So Bad at Executing People? — The description cites Joe Arridy's posthumous pardon as an example of people sentenced to death and later exonerated. (video description)
    • 201 (year) — year of Joe Arridy's posthumous pardon (as written, truncated) · for Joe Arridy · as of 2026-10-05 (implied: upload date) · no source named · doubtful

Verified (9)

2007

  • 2007-12-12 · Dec. 12th: w00t is the WORD OF THE YEAR?! — John reports that Merriam-Webster has announced 'woot' as its word of the year for 2007. (00:00:34)
    • woot (word) — Merriam-Webster word of the year · as of 2007 · source: Merriam-Webster · verified

2009

  • 2009-04-21 · Question Tuesday — John says the brilliant die at all ages, not just young (Einstein was 76), but we romanticize the ones who die young. (00:01:08)
    • 76 (years) — age at death · for Albert Einstein · as of 2009-04-21 (implied: date said in the video) · source: John · verified

2010

  • 2010-09-27 · Stop Embarrassing Yourself — Hank says the United Kingdom (of Northern Ireland and Great Britain) contains Great Britain, an island of three autonomous countries: Wales, Scotland and England. (00:01:34)
    • three (countries) — autonomous countries on the island of Great Britain · in Great Britain · as of 2010 · no source named · verified

2011

  • 2011-01-03 · Is bronchitis contagious? Is black a color? — Answering 'is Benjamin Franklin a president?', John says Franklin was never president of the United States and died aged 84, 221 years ago. (00:01:13)
    • 84 (years) — Benjamin Franklin's age at death · in United States · as of 2011-01-03 (implied: date said in the video) · no source named · verified
    • 221 (years ago) — time since Benjamin Franklin's death · as of 2011-01-03 · no source named · verified
  • 2011-03-16 · Why Did Fukushima Explode? — Hank says uranium-235 is a rare isotope that fissions when hit by any neutron and releases more neutrons, a chain reaction usable for a bomb or a power reactor. (00:02:01)
    • 235 (mass number) — isotope of uranium that fissions on any neutron hit (uranium-235) · as of 2011-03-16 (implied: upload date) · no source named · verified
  • 2011-03-16 · Why Did Fukushima Explode? — Hank says in a power plant the uranium-235 is in ceramic pellets that can never explode like a bomb, held in strong, heat-resistant zirconium-alloy tubes called fuel rods. (00:02:33)
    • 235 (mass number) — uranium isotope used in reactor fuel pellets (uranium-235) · as of 2011-03-16 (implied: upload date) · no source named · verified

2014

  • 2014-09-02 · MORTIFICATION — John corrects himself: he meant hectare, which is 100 ares, an are being a unit of 100 square meters. (00:00:20)
    • one hundred ares — area of one hectare · as of 2014-09-02 (implied: upload date) · no source named · verified
    • one hundred square meters — area of one are · as of 2014-09-02 (implied: upload date) · no source named · verified

2015

  • 2015-10-09 · The Surprising Truth About FLORIDA MAN! — Hank says Florida is the third largest US state by population, with great cultural, wildlife and habitat diversity. (00:00:18)
    • third largest (rank) — US state population rank · for US states · in Florida · as of 2015 · no source named · verified
  • 2015-11-12 · Cheez Doodles Guy, Ringo Silver, and Dad Jokes (Pizzamas Day 4) — John reports the World Health Organization announced that day that maternal death worldwide has fallen 44% over the last 25 years. (00:00:26)
    • 44% (percent decline) — maternal deaths (decline) · for maternal deaths · in worldwide · as of over the last 25 years (announced 2015-11-12) · source: World Health Organization · verified