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Lists: Science & nature

131 lists in parts of videos about science & nature (a written list: in videos about it), oldest first. All topics · Overview

2007

  • 2007-04-13 · Friday the 13th: Step It Up! · Hank, 2 named — Individually people are buying Priuses, turning off lights and using compact fluorescent bulbs, which Hank heartily encourages. (00:00:29)
    1 Toyota Prius “Priuses” · 2 compact fluorescent lamp

  • 2007-04-13 · Friday the 13th: Step It Up! · Hank, 3 named — Step It Up events are everywhere: one each in Missoula, Glacier and Corvallis (for Montana, three block parties on one block) and about 400 in New York City alone. (00:01:32)
    1 Missoula, Montana · 2 Glacier National Park · 3 Corvallis, Montana

  • 2007-06-04 · Brotherhood 2.0: June 4th: The First Nerdfighter Wedding! · Blake (quoted), 2 named — Blake commented that cars should never run on coal, but developing cleaner coal technology makes sense since countries like India and China won't phase out coal in 50 years. (00:02:31)
    1 India · 2 China

  • 2007-12-06 · Dec. 6th: Peer Pressure and the Green Green Manifesto · John, 8 named — The Yeti's Green Green Manifesto: compost, efficient bulbs, cloth bags, no soda, less paper, recycling, local food (00:01:38)
    1 compost · 2 compact fluorescent lamp “crazy Whirlygig light bulbs” · 3 reusable shopping bag “cloth bags” · 4 soft drink “soda” · 5 paper towel · 6 recycling “recycle” · 7 local food · 8 native plant

  • 2007-12-17 · Project for Awesome: Explanation and Humane Societies · Hank, 6 named — Hank says people might expect him to advocate green technology, his day job (cellulosic ethanol, e-readers, CFLs, solar, less junk mail); he strongly believes in them but picks another cause. (00:01:09)
    1 cellulosic ethanol · 2 e-reader “paperless book readers” · 3 compact fluorescent lamp · 4 solar power · 5 advertising mail · 6 terraforming of Mars

2009

  • 2009-01-16 · Hank Green from the Detroit Auto Show · Hank, 3 named — Hank advises car buyers that the 2010 Prius looks like a good choice, the Honda Insight saves money (though less gas), and the Volt is coming soon. (00:03:02)
    1 Toyota Prius · 2 Honda Insight · 3 Chevrolet Volt

  • 2009-06-03 · Protons and Neutrons: A Song · Hank, 3 named — Hank sings that his guitar string is made of atoms (protons, neutrons, electron clouds) packed into lattices among billions and trillions of others. (00:00:12)
    1 proton · 2 neutron · 3 electron

  • 2009-06-03 · Protons and Neutrons: A Song · Hank, 4 named — Hank sings that carbon, oxygen, nitrogen and hydrogen form proteins stacked into beta pleated sheets, making the thing that grows out from his finger and strikes the guitar string. (00:01:32)
    1 carbon · 2 oxygen · 3 nitrogen · 4 hydrogen

2010

  • 2010-01-15 · Introduction to Chemistry with Hank · Hank, 2 named — Carbon fills its orbitals by sharing electrons with other atoms: with hydrogen it forms methane, with oxygen carbon dioxide, which Hank calls the two principal greenhouse gases. (00:01:27)
    1 methane · 2 carbon dioxide

  • 2010-03-24 · Top 10 Animal POWER MOVES · John, 10 named — Power moves 10-6: bombardier beetle, giraffe, Cantor's giant softshell turtle, hairy frog, cuttlefish (00:00:08)
    1 bombardier beetle · 2 giraffe · 3 Cantor's giant softshell turtle · 4 hairy frog “Trichobatrachus Robostus” · 5 cuttlefish · 6 potato beetle · 7 Mabra elephantophila · 8 Australian funnel-web spider · 9 platypus · 10 Camponotus saundersi

  • 2010-05-07 · How to Live Forever · Hank, 8 named (1 unnamed item) — Paths 1-3 to immortality: hoping for good medicine, travelling near the speed of light, cryonics (00:00:29)
    1 longevity escape velocity “until life expectancy starts to go up more than one year per year” · 2 time dilation · 3 cryonics · … · 5 technological singularity · 6 Turritopsis dohrnii “the immortal jellyfish” · 7 selective breeding · 8 telomere · 9 mind uploading “downloading the thoughts and memories that comprise”

  • 2010-10-20 · Strange Charm: A Song about Quarks · Hank, 6 named — The chorus names the quarks up, down, strange, charm, top and bottom, says you have them even if you don't know what a quark is, and that with leptons and bosons they make up everything we know exists. (00:00:31)
    1 up quark · 2 down quark · 3 strange quark · 4 charm quark · 5 top quark · 6 bottom quark

  • 2010-10-20 · Strange Charm: A Song about Quarks · Hank, 2 named — The chorus names the quarks up, down, strange, charm, top and bottom, says you have them even if you don't know what a quark is, and that with leptons and bosons they make up everything we know exists. (00:00:37)
    1 lepton · 2 boson

  • 2010-10-20 · Strange Charm: A Song about Quarks · Hank, 4 named — The song says quarks have electric charge, color charge, mass and spin; color charge means they exist only inside other particles, so they have never been studied alone. (00:00:53)
    1 electric charge · 2 color charge · 3 mass · 4 spin (physics)

  • 2010-10-20 · Strange Charm: A Song about Quarks · Hank, 2 named — The song says quarks join in two ways, baryons (three quarks) and mesons (a quark and an antiquark), and that most instantly decay. (00:01:18)
    1 baryon · 2 meson

  • 2010-11-08 · Probability 101 · Hank, 3 named (playful) — Hank says no one, not Miss Cleo, Albert Einstein or even Dr. Manhattan, could know where an individual coin would fall. (00:01:55)
    1 Miss Cleo · 2 Albert Einstein · 3 Doctor Manhattan

  • 2010-11-08 · Probability 101 · Hank, 2 named (hypothetical) — In the poison-dart problem (6 Tylenol, 4 Imodium AD, 4 antidote pills, three picks), Hank gets a 33% chance of no antidote, so 67% survival. (00:06:46)
    1 Tylenol · 2 Imodium

  • 2010-11-12 · Blood!!! · Hank, 2 named (playful) — Heme and iron bond oxygen; comic analogies; hemoglobin prefers carbon monoxide (00:01:27)
    1 The Clash · 2 Cristiano Ronaldo

  • 2010-11-22 · Thoughts from Places: On a Horse · Hank, 2 named — Hank says before 4000 BC all work for humans was done by humans; using beasts of burden was a leap on the order of the industrial revolution or the internet. (00:02:50)
    1 Industrial Revolution · 2 Internet

  • 2010-12-01 · Makin' Babies: A Song · Hank, 2 named — Space pasta results: viewers' calculations show Moon pasta far less efficient than Earth beef (00:02:24)
    1 Mike Lombardo · 2 TheDanc1ngHawk “the Dancing Hawk's”

2011

  • 2011-02-23 · WE ARE 812 YEARS OLD · John, 3 named — Re-carbon-neutralizing: 122 million views at 3.5 minutes make Nerdfighteria 812 years old (00:00:55)
    1 Nerdfighter Ning · 2 Your Pants · 3 YouTube

  • 2011-03-16 · Why Did Fukushima Explode? · Hank, 5 named — Hank defines terms: the nucleus holds protons and neutrons; a nuclear reaction changes it by splitting or fusing; nuclear radiation usually means ionizing radiation, which can be harmless or not. (00:00:33)
    1 atomic nucleus · 2 nuclear reaction · 3 ionizing radiation · 4 radioactive decay · 5 nuclear fission

  • 2011-04-13 · 31 Jokes for NERDS! · video description, 3 named (1 unnamed item) —
    1 Harry Potter (book series) · … · 3 Star Trek (franchise) · 4 Star Wars

  • 2011-04-27 · NASA: Increasing Awesome · Hank, 7 named (5 unnamed items) — 'Besides...' list of what NASA does: ISS, Mars rover, Webb telescope, private space, Mercury orbiter, climate satellites, exoplanets, shuttle and new crew vehicle (00:01:43)
    1 International Space Station · 2 Mars Science Laboratory “remote-controlled SUV” · 3 James Webb Space Telescope · … · 5 MESSENGER “the first artificial satellite around Mercury” · … · 10 exoplanet “planets outside of our solar system” · 11 Space Shuttle · 12 Orion (spacecraft) “new multipurpose crew vehicle”

  • 2011-06-13 · Google Is Alive! · Hank, 3 named — Hank says telling dead from alive seems simple, but the hard question is whether a virus, or a computer virus, is ever alive, or robots like Johnny 5 and GLaDOS. (00:00:21)
    1 Johnny 5 · 2 batteries not included · 3* GLaDOS

  • 2011-07-06 · John Green is an IDIOT! And so are you. · Hank, 3 named (playful) — Hank tells John, lovingly, that he is a stupid idiot, because we are all stupid idiots: some of us are racist, pay $600 for a Gucci purse or watch Jersey Shore. (00:00:09)
    1 racism “some of us are racist” · 2 Gucci · 3 Jersey Shore

  • 2011-07-06 · John Green is an IDIOT! And so are you. · Hank, 4 named — There are many more: authority bias (anchoring on a source), egocentric bias (remembering our own deeds positively, like the size of a fish) and wishful thinking. (00:02:58)
    1 authority bias · 2 egocentric bias · 3 wishful thinking · 4 hyperbolic discounting

  • 2011-07-11 · Hank Talks to NASA About the Space Shuttle · Hank, 3 named (playful) — Hank says that as new sitcoms such as 30 Rock, The Office and Parks and Rec replaced Seinfeld, the shuttle's time is done; the question is what replaces it ('what is our 30 Rock'). (00:00:29)
    1 30 Rock · 2 The Office (American TV series) · 3 Parks and Recreation

  • 2011-11-23 · Why are Barns Red and Kardashians Famous · Hank, 12 named (14 unnamed items) — B–M: barns, Cuban cigars, Dina and Caroline, enzymes, flamingos, grapes and dogs, Jews, Kardashians, leaves, manhole covers (00:01:16)
    … · 3 Cuba · … · 5 enzyme · … · 11 Kardashian family “Kardashians” · 12 chlorophyll · … · 14 noble gas · … · 17 Q-tips · 18 Republican Party “republicans” · 19 significant figures · 20 carpetbagger · 21 trade union “unions” · … · 25 contagious yawning · 26 zombie

2012

  • 2012-02-07 · 10 Misconceptions Debunked! · John, 3 named — John says humans have far more than the five senses Aristotle identified, including thermoception, a sense of body and limb position, and equilibrioception (balance). (00:02:35)
    1 thermoception · 2 proprioception “you can sense body and limb position” · 3 equilibrioception

  • 2012-02-17 · World's Smallest Animals · Hank, 7 named — Smallest reptile (Virgin Islands dwarf gecko), the frog-or-fish smallest-vertebrate controversy, dime and quarter for scale, and the male anglerfish (00:00:34)
    1 Virgin Islands dwarf gecko · 2 anglerfish · 3 bee hummingbird · 4 Kitti's hog-nosed bat · 5 Etruscan shrew · 6 Batodonoides vanhouteni · 7 Madame Berthe's mouse lemur

  • 2012-02-17 · World's Smallest Animals · Hank, 3 named — Hank names domestic record-holders: Ducky, the current smallest dog at 1.4 pounds, and Thumbelina, a miniature horse just 17 inches tall, which he says does not sound healthy. (00:02:31)
    1 Ducky · 2 Thumbelina · 3 Mr. Peebles

  • 2012-03-09 · The Future of Manned Space Exploration · Hank, 4 named — Hank's personal bucket list: visit the Grand Canyon, soak in a geothermal hot spring in Iceland, and be kissed on the cheek by Natalie Portman and Emma Stone at once. (00:00:00)
    1 Grand Canyon · 2 Iceland · 3 Natalie Portman · 4 Emma Stone

  • 2012-05-05 · It's HANKO DE MAYO!!!!! · John, 3 named — John says the James Webb Space Telescope is being built primarily by Northrop Grumman and funded by NASA, the European Space Agency and the Canadian Space Agency, with about 17 countries involved. (00:00:00)
    1 NASA · 2 European Space Agency · 3 Canadian Space Agency

  • 2012-07-06 · The Higgs Boson · Hank, 4 named — Hank says there are only four forces in the universe (strong, weak, gravity, electromagnetism) and only three types of particles, so it is remarkably simple. (00:00:35)
    1 Strong interaction · 2 Weak interaction · 3 Gravity (concept) · 4 Electromagnetism

  • 2012-09-07 · Can You Really Light a Fart? · Hank, 2 named — Hank says farts can be lit because they include flammable methane and hydrogen, but warns that holding a flame to your pants is dangerous. (00:03:03)
    1 methane · 2 hydrogen

2013

  • 2013-01-15 · An Evening of Awesome at Carnegie Hall · Hank, 2 named — Hank says everything we know about is made of leptons, bosons and quarks, and sings his quark song. (02:11:54)
    1 lepton · 2 boson

  • 2013-05-10 · Some Mind-Bending Earth GIFs · Hank, 2 named — Hank says much of the Amazon rainforest has been cut down, and only watching it happen across Brazil and Bolivia shows the depth and scale. (00:01:23)
    1 Brazil · 2 Bolivia

  • 2013-05-10 · Some Mind-Bending Earth GIFs · Hank, 3 named — Hank says the time-lapses tell a story of water: Las Vegas and Dubai spreading across deserts, Saudi irrigation making deserts bloom, inland seas drying up from drought or irrigation. (00:01:38)
    1 Las Vegas · 2 Dubai · 3 Saudi Arabia

  • 2013-06-14 · What is the Strongest Force on Earth? · Hank, 4 named — Hank: physicists say there are only four forces in the universe: gravity (the weakest), electromagnetism, the weak nuclear force and the strong nuclear force. (00:00:32)
    1 Gravity (concept) · 2 Electromagnetism · 3 Weak interaction · 4 Strong interaction

  • 2013-08-16 · Harry Potter vs. Science! · Hank, 3 named — Most inspirational: the detail of the Harry Potter universe inspires Hank, but less than Darwin's pigeons, Wallace's collections and Linnaeus's pressings, which connect him to the history of life. (00:01:27)
    1 Charles Darwin · 2 Alfred Russel Wallace · 3 Carl Linnaeus

  • 2013-10-25 · When Was it a Million Seconds Ago? · Hank, 3 named — A billion seconds ago was 1982 — the time of Michael Jackson's Thriller, E.T. and the Falklands War. (00:01:13)
    1 Thriller · 2 E.T. the Extra-Terrestrial · 3 Falklands War

  • 2013-11-01 · Scarier than Gravity: Real Life Close Calls in Space · Hank, 8 named — Neil Armstrong's spinning Gemini 8 (1966); Alexei Leonov's swollen spacesuit and wolf-surrounded landing (1965) (00:00:29)
    1 Gemini 8 · 2 Alexei Leonov · 3 Boris Volynov · 4 Soyuz 18a · 5 Soyuz 23 · 6 Apollo 13 · 7 Apollo 12 · 8 Luca Parmitano

2014

  • 2014-02-07 · Kill All The Humans · Hank, 6 named — Hank says we are in an environmental crisis (climate change, oil spills, dead zones, garbage patches, meltdowns, mass extinction) whose root is people, created to satisfy human needs or whims. (00:00:05)
    1 climate change · 2 Oil spill · 3 Dead zone (ecology) · 4 Garbage patch · 5 nuclear meltdown “Meltdowns” · 6 Extinction event

  • 2014-04-01 · VELOCIRAPTORS · John, 2 named — John says velociraptors belonged to the feathered, bird-like dromaeosaurid family; they could not fly, and their feathers were maybe for attracting mates but probably an evolutionary leftover. (00:02:19)
    1 blind mole-rat · 2 humpback whale

  • 2014-04-25 · I Love Science (Clean Version) (Uncensored link in the Description) · Hank, 8 named — Hank lists what science gives us, from woolly mammoth embryos and vaccines for smallpox and polio to the internet, the PS4, exoplanets, DNA, germ theory and relativity: life would be sad without it. (00:01:23)
    1 smallpox · 2 polio · 3 Internet · 4 PlayStation 4 “PS4” · 5 exoplanet · 6 DNA · 7 germ theory of disease · 8 theory of relativity

  • 2014-12-26 · The Best and Worst of 2014 · Hank, 2 named (1 unnamed item) — Hank points to SciShow, where Michael Aranda gave 2014's science superlatives: the deepest-diving whale, the most Earth-like planet, the highest CO2 emissions and the warmest months. (00:00:10)
    … · 2 exoplanet “the most Earth-like planet” · 3 carbon dioxide “CO2 emissions”

2015

  • 2015-01-09 · 14 Fart Facts for my Flatulent Friends · Hank, 5 named — Hank says more than 99% of fart gas is odorless; farts are mainly carbon dioxide, hydrogen, sometimes nitrogen and oxygen, and methane. (00:01:02)
    1 carbon dioxide · 2 hydrogen · 3 nitrogen · 4 oxygen · 5 methane

  • 2015-08-28 · ALL of Wikipedia in One QR Code? · Hank, 2 named — Hank says a QR code visually represents data, like barcodes, snapcodes, facial expressions or writing, and each block of 2 by 4 squares codes one byte, one character. (00:00:02)
    1 barcode · 2 Snapcode

  • 2015-09-11 · Yellowstone: The Terror of Change · Hank, 2 named — Hank shows New Blue Spring, now dormant and white, and Constant Geyser, named because it never stopped spurting, until it did. (00:02:09)
    1 New Blue Spring · 2 Constant Geyser

2016

2017

  • 2017-01-13 · Top 10 Best Dogs Ever · Hank, 7 named (3 unnamed items) — The top 10 best dogs: real hero and famous dogs mixed with a cat, chipmunks and a canary (00:00:23)
    1 Sergeant Stubby · 2 Lily · … · 5 Laika · 6 Alvin and the Chipmunks · 7 Bummer and Lazarus · … · 9 Tweety · 10 Lemon

  • 2017-03-24 · I Disagree with Me (Thoughts from Lake Powell) · Hank, 3 named — Hank says Hoover Dam created Lake Mead in the 1930s; later three large storage sites were proposed: Echo Park (flooding parts of Dinosaur National Monument), Bridge Canyon (parts of the Grand Canyon) and Glen Canyon. (00:00:08)
    1 Echo Park · 2 Bridge Canyon · 3 Glen Canyon

  • 2017-03-24 · I Disagree with Me (Thoughts from Lake Powell) · Hank, 3 named — Hank is thrilled that, especially over the last decade, technology has come to be seen more as a tool for protecting the environment, dismantling the old dichotomy through electric cars, solar panels and LED bulbs. (00:05:13)
    1 Electric car · 2 solar power · 3 LED lamp

  • 2017-06-30 · Eyes Made of Crystal? - Trilobites are Bizarre · Hank, 2 named — In the 1600s Huygens and Descartes devised lens shapes fixing this; the trilobites Crozonaspis and Dalmanitina had matching eye-lens shapes, keeping near and far objects in focus with less distortion. (00:02:59)
    1 Christiaan Huygens · 2 René Descartes

  • 2017-06-30 · Eyes Made of Crystal? - Trilobites are Bizarre · Hank, 2 named — In the 1600s Huygens and Descartes devised lens shapes fixing this; the trilobites Crozonaspis and Dalmanitina had matching eye-lens shapes, keeping near and far objects in focus with less distortion. (00:03:05)
    1 Crozonaspis “Crozonapsis” · 2 Dalmanitina

  • 2017-11-10 · The Weirdest Living Animals - (With Dr. Lawrence Turtleman) · Dr. Lawrence Turtleman, 5 named — Taxonomic islands: aardvark, hoatzin, coelacanths, tuatara, ginkgo (00:01:33)
    1 Aardvark · 2 Hoatzin · 3 Coelacanth · 4 tuatara · 5 Ginkgo biloba

2018

  • 2018-04-24 · This Video is about Red Eyed Tree Frogs? · John, 2 named — The red-eyed tree frog is a tree-dwelling, 2-inch-long frog with about a five-year lifespan, native to Central America and southern Mexico. (00:00:51)
    1 Central America · 2 Mexico

  • 2018-10-19 · This is the scariest graph I've ever seen · video description, 3 named — Hank cites three papers: on country responsibility and risk from global sea-level rise, on committed sea-level rise under the Paris Agreement and delayed mitigation, and on flood damage costs as sea levels rise with warming.
    1 Global sea-level rise: weighing country responsibility and risk · 2 Committed sea-level rise under the Paris Agreement and the legacy of delayed mitigation action · 3 Flood damage costs under the sea level rise with warming of 1.5 °C and 2 °C

2019

  • 2019-05-24 · The Monterey Bay Aquarium Has a Secret · Hank, 4 named — Last week (week of 13 May 2019) Hank went to the Monterey Bay Aquarium, which he calls one of the best places on earth, and delighted in mudskippers, otters, mola mola and cuttlefish. (00:00:00)
    1 mudskipper · 2 otter · 3 ocean sunfish “mulla mulla” · 4 cuttlefish

  • 2019-05-31 · Uncomfortable Nuance: Natural Gas Edition · Hank, 2 named — Hank says renewables like wind and solar are also part of coal's decline, but natural gas is a really important part. (00:00:40)
    1 wind power · 2 solar power

  • 2019-06-14 · What /Actually/ Happened at Chernobyl · Hank, 3 named — Hank says reactor heat comes mostly from fission and secondarily from the decay of unstable fission products, which keeps producing heat after the reaction stops. (00:01:32)
    1 radioactive decay · 2 nuclear fusion · 3 nuclear fission

  • 2019-07-02 · On Sunlight · John, 3 named — John notes Wikipedia's long list of solar deities: Egypt's Ra, Greece's Helios and the Aztec Nanahuatzin, who leapt into a bonfire to become the sun. (00:00:29)
    1 Ra · 2 Helios · 3 Nanahuatzin

  • 2019-08-02 · The Cutest Octopus · Hank, 2 named — Octopuses form two suborders, Cirrina and Incirrina. (00:00:29)
    1 Cirrina “cirrida” · 2 Incirrina “incirrida”

  • 2019-11-04 · This Cat Makes No Sense · Hank, 6 named — Hank says Pallas's cats range across Tibet, China, Pakistan, India, Mongolia and Iran, living solitarily on small rodents and birds, with the longest hair of any cat, stealth hunting and fertility windows as short as one day a year. (00:00:00)
    1 Tibet · 2 China · 3 Pakistan · 4 India · 5 Mongolia · 6 Iran

2020

  • 2020-01-24 · Horses are Very Weird · Hank, 3 named — Hank says humans, ostriches, mice and Tyrannosaurus rex all have the same limb pattern: bone, bone, foot. (00:02:40)
    1 ostrich · 2 mouse “mice” · 3 Tyrannosaurus

  • 2020-03-06 · I Did Not Get Leprosy! · video description, 3 named — In a comment John invites viewers to come see him and Hank on tour next week (week of 9 March 2020) in Indianapolis, Columbus or Ann Arbor.
    1 Indianapolis · 2 Columbus, Ohio · 3 Ann Arbor, Michigan

  • 2020-03-06 · I Did Not Get Leprosy! · Hank, 3 named — Hank says armadillos are most closely related to anteaters and there are many species, such as pink fairy, three-banded, nine-banded and giant armadillos. (00:01:56)
    1 pink fairy armadillo · 2 three-banded armadillo · 3 giant armadillo

  • 2020-03-27 · Take a Break with Some Feather Stars · Hank, 2 named — Hank says the seaway stretched from the Gulf of Mexico to the Arctic Ocean and was at most 900 meters deep, while the Mediterranean's deepest point is 5,000 meters. (00:00:00)
    1 Gulf of Mexico · 2 Arctic Ocean

  • 2020-03-27 · Take a Break with Some Feather Stars · Hank, 3 named — Hank says feather stars, like other echinoderms such as starfish, sea urchins and sea cucumbers, have five-sided (pentaradial) symmetry. (00:01:27)
    1 starfish · 2 sea urchin · 3 sea cucumber

  • 2020-03-31 · Let's take a walk. · John, 4 named — John traces the water's path: the White River flows into the Wabash, then the Ohio, then the Mississippi, and into the Gulf of Mexico. (00:01:23)
    1 Wabash River · 2 Ohio River · 3 Mississippi River · 4 Gulf of Mexico

  • 2020-05-15 · Lookin' Kinda Dumb! · Hank, 2 named — Hank says the shoebill stork and the Malabar giant squirrel are such real animals on Snopes. (00:00:58)
    1 shoebill · 2 Indian giant squirrel

  • 2020-06-12 · Fed to the Rules · Hank, 2 named — Hank says the island is home to very weird species: what might be the world's rarest frog, literally millions of seabirds, a darkling beetle, and a stronghold of tuatara. (00:00:29)
    1 darkling beetle · 2 tuatara

  • 2020-06-19 · Only Shooting Stars · video description, 4 named — The description lists the registration-only tour stops July 6-10 with John, Ashley C. Ford, Roman Mars and Cory Doctorow, plus the free July 7 YouTube launch.
    1 John Green · 2 Ashley C. Ford · 3 Roman Mars · 4 Cory Doctorow

  • 2020-06-19 · Only Shooting Stars · Hank, 2 named — Hank says bits of Venus and Mercury have probably also landed on Earth, but none has ever been found. (00:02:06)
    1 Venus · 2 Mercury

  • 2020-08-21 · The Water's Getting Warm · Hank, 3 named — Hank questions the line: cancer, kind of, nuclear proliferation and poverty are also global collective problems; it depends on what he meant by collective. (00:00:17)
    1 cancer · 2 nuclear proliferation · 3 extreme poverty

  • 2020-09-18 · They Say it Gets Colder · Hank, 2 named — Hank says Enceladus and Europa, icy moons of gas giants, definitely have giant oceans of liquid water beneath their icy surfaces. (00:00:26)
    1 Enceladus · 2 Europa

2021

  • 2021-05-21 · The 19 Best Facts · Hank, 2 named — Hank's best music fact: Dolly Parton wrote Jolene and I Will Always Love You on the same car trip, alone in the car; extra good because many don't know she wrote I Will Always Love You. (00:00:29)
    1 Jolene · 2 I Will Always Love You

  • 2021-05-28 · Aliens · Hank, 3 named — Things we really don't understand have happened often in human history and are often the first step to discovery: we guess and test, which is how we got COVID vaccines, smartphones and in-depth knowledge of the Big Bang. (00:01:14)
    1 vaccine · 2 smartphone · 3 Big Bang

  • 2021-05-28 · Aliens · Hank, 5 named — Big mysteries remain totally unexplained: what dark matter is, though it is most of the stuff; why anything exists, why there is matter in the universe; how life started on Earth; why we sleep and why we yawn. (00:01:45)
    1 dark matter · 2 baryon asymmetry “why there's matter in the universe” · 3 abiogenesis “how life started on Earth” · 4 sleep · 5 yawn

  • 2021-05-28 · Aliens · Hank, 2 named — First problem with explanations of anything: no mystery has ever been solved by something that explains everything; big ones like natural selection and quantum mechanics explain a lot but not everything, not even each other. (00:02:31)
    1 natural selection · 2 Quantum mechanics

  • 2021-07-09 · Wrong on the Internet · Hank, 2 named — Hank cites an article by social psychologists Hackel and Sparkman: people act not because they see smoke but because they see others rushing in with water. (00:03:14)
    1 Leor Hackel · 2 Gregg Sparkman

  • 2021-08-13 · How We Fix the Climate · Hank, 5 named — Carbon pricing starts from the fact that emitting CO2 is free but will be very costly: future people will bear wildfires, droughts, famines, wars, refugees and sea level rise, costs not priced in. (00:05:13)
    1 wildfire · 2 drought · 3 Famine · 4 refugee · 5 Sea level rise

  • 2021-08-13 · How We Fix the Climate · Hank, 3 named — The approaches can be combined, and exist widely: China, Canada and the EU have cap and trade; Japan, Turkey, Thailand, Indonesia and much of Europe have carbon taxes; nearly everywhere has some regulation. (00:14:32)
    1 China · 2 Canada · 3 European Union

  • 2021-08-13 · How We Fix the Climate · Hank, 5 named — The approaches can be combined, and exist widely: China, Canada and the EU have cap and trade; Japan, Turkey, Thailand, Indonesia and much of Europe have carbon taxes; nearly everywhere has some regulation. (00:14:33)
    1 Japan · 2 Turkey · 3 Thailand · 4 Indonesia · 5 Europe

  • 2021-10-11 · The Fastest Things in the Universe (Entirely According to Me) · Hank, 3 named — By the 1960s people went from 120 to over 24,000 miles per hour; the record, set by Tom Stafford, John Young and Eugene Cernan returning from the Moon on Apollo 10, is unbeaten. (00:01:38)
    1 Thomas P. Stafford · 2 John Young · 3 Eugene Cernan

  • 2021-10-11 · The Fastest Things in the Universe (Entirely According to Me) · Hank, 3 named — Lower orbits are faster: Mercury orbits the Sun faster than Venus, Venus than Earth, Earth than Mars, so a probe close to the Sun goes very fast. (00:02:02)
    1 Mercury · 2 Venus · 3 Earth

  • 2021-10-26 · Why Avocados Still Exist · John, 7 named — John lists huge animals once in the Americas: a beaver of almost 300 pounds, the mastodon, the American lion, the dire wolf, glyptotherium up to 2,000 pounds, 15-foot giant sloths and massive bears. (00:00:29)
    1 giant beaver · 2 mastodon · 3 American lion · 4 dire wolf · 5 Glyptotherium · 6 ground sloth “giant sloths” · 7 bear

  • 2021-11-12 · Everything a Normal Person Needs to Know About Helium · Hank, 3 named — Hank says helium drilling found a reserve in Tanzania big enough to fill 1.5 million MRI machines, with more resources found in Canada and Australia. (00:02:57)
    1 Tanzania · 2 Canada · 3 Australia

  • 2021-12-17 · What State of Matter is Fire · video description, 4 named — The description recommends other YouTube videos on the question: It's OK to be Smart's (his favourite), a very short MinutePhysics one, and a TED-Ed video arguing fire is a process, not matter.
    1 It's Okay to Be Smart · 2 Henry Reich “Minute Physics” · 3 Derek Muller “Veritasium” · 4 TED-Ed

2022

  • 2022-07-15 · Thoughts From the Universe - Woah · Hank, 2 named — Hank says life on Earth, everything from brachiosaurus to BTS, has existed for 27% of the lifetime of the universe. (00:02:19)
    1 Brachiosaurus · 2 BTS

  • 2022-08-12 · The Biggest Climate Bill of Your Life - But What does it DO!? · Hank, 3 named — Jenkins says supportive policies in the US, China, Germany, Japan and elsewhere turned expensive alternatives into cheap, trillion-dollar mainstream technologies scaling rapidly. (00:03:08)
    1 China · 2 Germany · 3 Japan

  • 2022-10-07 · Planets Don't Exist · John, 2 named — John says making our own light, as fireflies and anglerfish do, is one of the coolest things because the idea is so beautiful. (00:08:14)
    1 firefly (concept) “fireflies” · 2 anglerfish

  • 2022-11-18 · How Much Does Humanity Weigh? · Hank, 3 named — Hank says the extinction is much debated, but humans definitely contributed: it coincided closely with humans' arrival in North and South America and, separately, Australia. (00:02:11)
    1 North America · 2 South America · 3 Australia

2023

  • 2023-03-10 · Is it Good or Bad that we Haven't Met Aliens? · Hank, 5 named (hypothetical) — Hank says the great filter could be AI, global warming, nuclear weapons or social media, maybe TikTok; we don't know. (00:00:04)
    1 artificial intelligence “AI” · 2 climate change “global warming” · 3 nuclear weapon · 4 social media · 5 TikTok

  • 2023-03-24 · The Two Reasons Why Humans Have Such Bad Backs · Hank, 3 named — Hank says chimpanzees, gorillas and orangutans, our three closest relatives, don't get herniated discs, which raises the question of why. (00:01:34)
    1 chimpanzee · 2 gorilla · 3 orangutan

  • 2023-07-21 · The Biggest Weirdest Telescope We've Ever Built · Hank, 5 named — Hank says the different kinds of electromagnetic radiation (infrared, ultraviolet, X-rays, gamma rays, microwaves) each give different clues about how the universe works. (00:01:27)
    1 Infrared · 2 ultraviolet · 3 X-ray · 4 gamma ray · 5 microwave

  • 2023-07-21 · The Biggest Weirdest Telescope We've Ever Built · Hank, 2 named — Hank says events in the universe emit photons and also massive particles such as electrons, protons and nuclei, but those are absorbed by galactic gas and dust, so they are not very useful. (00:03:25)
    1 electron · 2 proton

  • 2023-08-04 · The Biggest Science Story of the Week · Hank, 3 named — Hank says we must do three things at once: stop emitting new carbon dioxide, start removing old CO2, and deal with the unavoidable impacts of current warming. (00:04:40)
    1 energy transition “stop putting new carbon dioxide in the atmosphere” · 2 Carbon dioxide removal “taking old CO2 out of the atmosphere” · 3 Climate change adaptation “deal with the impacts of the current warming”

  • 2023-09-08 · Giraffes are Way More Complicated Than We Thought · Hank, 3 named — Hank says post-reproductive females are rare: humans, killer whales, some other whales (pilot whales, he thinks), arguably elephants, and now giraffes. (00:03:21)
    1 killer whale · 2 pilot whale · 3 elephant

  • 2023-10-04 · A Messy and Unhinged Introduction to Geoengineering · Hank, 2 named — Hank lists techniques of rising impact: high-albedo crops, ocean mirrors, marine cloud brightening, thinning heat-trapping cirrus clouds, and stratospheric sulfur dioxide injection. (00:03:18)
    1 Marine cloud brightening · 2 Stratospheric aerosol injection

  • 2023-10-04 · A Messy and Unhinged Introduction to Geoengineering · Hank, 2 named — 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. (00:05:50)
    1 solar power · 2 wind power

2024

  • 2024-02-09 · My Favorite Climate Graph · Hank, 3 named — Hank says around $100 per ton solar, wind and EVs level off, and weirder options such as zero-carbon synthetic fuels and hydrogen start to make sense. (00:02:02)
    1 solar power · 2 wind power · 3 Electric car “EVs”

  • 2024-05-09 · We’re Here Because... Something Broke · John, 2 named — Katie says the discovery that the different elements are arrangements of the same fundamental particles was mind-blowing: hydrogen and carbon are just different numbers of protons, neutrons and electrons. (00:00:50)
    1 hydrogen · 2 carbon

  • 2024-05-09 · We’re Here Because... Something Broke · John, 3 named — Katie says the discovery that the different elements are arrangements of the same fundamental particles was mind-blowing: hydrogen and carbon are just different numbers of protons, neutrons and electrons. (00:00:52)
    1 proton · 2 neutron · 3 electron

  • 2024-05-09 · We’re Here Because... Something Broke · John, 3 named — Katie says there are good theories unifying the strong, weak and electromagnetic forces of particle physics, but physicists have not yet managed it with gravity. (00:01:50)
    1 Strong interaction · 2 Weak interaction · 3 Electromagnetism “electromagnetic”

  • 2024-05-23 · The Weird Timescales of the Universe · John, 2 named — Katie says the era is called the Dark Ages because the primordial plasma has cooled but there are no stars yet; the universe is mostly hydrogen gas with a little helium. (00:00:27)
    1 hydrogen · 2 helium

  • 2024-05-23 · The Weird Timescales of the Universe · John, 2 named — When John suggests that a perfectly uniform observable universe would never have had stars and galaxies, Katie says random particle motion would still give fluctuations, so something would eventually happen, but differently and much later. (00:02:23)
    1 star · 2 galaxy “galaxies”

  • 2024-06-04 · how it all ends · John, 2 named — John says the Sun will later become a red giant so bright and large that it consumes Mercury and Venus and probably, though not definitely, Earth. (00:02:18)
    1 Mercury · 2 Venus

  • 2024-06-11 · BEEF DAYS · John, 2 named — John says Americans still eat about twice as much beef as people in Germany or the United Kingdom. (00:00:34)
    1 Germany · 2 United Kingdom

  • 2024-06-11 · BEEF DAYS · John, 2 named — John says climate talk tends to focus on technologies like electric cars, solar panels and batteries, which matter, but we don't talk enough about social norms. (00:01:23)
    1 Electric car · 2 solar power

  • 2024-06-11 · BEEF DAYS · John, 3 named — John says it is almost impossible to explain to young people today how cool smoking was in the 20th century: everybody cool smoked, like Billie Holiday, Albert Einstein and Dick Trickle. (00:02:39)
    1 Billie Holiday · 2 Albert Einstein · 3 Dick Trickle

  • 2024-06-11 · BEEF DAYS · John, 3 named — John says feast days occur throughout the world and history, from Mesoamerica to the Islamic world to Europe: on agreed holidays communities feast, maybe on foods forbidden other days. (00:03:36)
    1 Mesoamerica · 2 Islam · 3 Europe

  • 2024-06-14 · Some Reasons why People Suck · Hank, 2 named — Hank says progress in environmental technologies has been remarkable: the graphs of the falling cost of solar panels, wind turbines and batteries are mind-blowing. (00:00:00)
    1 solar power · 2 wind power

  • 2024-07-26 · Hank Green's Top 7 Best Coconut Tree Facts!! · Hank, 4 named — Hank says it is not certain where coconuts evolved, but before people moved them (for fresh water on voyages, and taste) they were probably confined to Southeast Asia and Indonesia, maybe Australia and southern India. (00:02:35)
    1 Southeast Asia · 2 Indonesia · 3 Australia · 4 India

  • 2024-12-06 · One of the Most Important Images On Earth · Hank, 2 named — Hank says Homo sapiens once shared the planet with three other species of people (Neanderthals, Denisovans, Floresiensis), maybe more, since Floresiensis was found only about 20 years ago. (00:01:49)
    1 Denisovan · 2 Homo floresiensis

2025

  • 2025-07-15 · LLAMAS Are NOT What You Think · John, 4 named — Llamas and tuberculosis; fish that resemble their names; seahorses; riding llamas and becoming a centaur (00:01:06)
    1 Boxfish · 2 Barracuda · 3 Pike (fish) · 4 Needlefish

  • 2025-07-22 · At Least There Are Trees · John, 2 named — John says he has become a tree nerd in middle age: apps identify trees for him, and he notes in his gratitude journal seeing a northern red oak or a sugar maple. (00:01:21)
    1 Quercus rubra “northern red oak” · 2 Acer saccharum “sugar maple”

  • 2025-07-25 · The Molecule that Changed Everything · Hank, 2 named — Hank says 300 million years later humans dug up that coal and burned it for warmth, then for steam engines, smelting iron, making fertilizer and electrifying cities. (00:04:31)
    1 steam engine · 2 fertilizer

  • 2025-09-05 · Caffeine is Very… · Hank, 9 named — Hank says drinking caffeinated teas arose seven separate times: tea in East Asia, coffee in the Horn of Africa and Arabia, cacao in Mesoamerica, kola nut in West Africa, guarana in the Amazon Basin, yerba mate in the Southern Cone, yaupon in southeastern North America. (00:04:48)
    1 China · 2 East Asia · 3 Horn of Africa · 4 Arabian Peninsula · 5 Mesoamerica · 6 West Africa · 7 Amazon basin · 8 Southern Cone · 9 North America

  • 2025-09-12 · This Might Actually be Happening · Hank, 4 named — Hank lists life's four big macromolecules, DNA, proteins, carbohydrates and lipids, and says DNA breaks down too fast to help over billions of years. (00:08:32)
    1 DNA · 2 protein · 3 carbohydrate · 4 lipid

  • 2025-09-12 · This Might Actually be Happening · Hank, 2 named — Hank says evidence of Earth's earliest life rests on isotopic fractionation in 3.5-billion-year-old rocks in Australia and South Africa, the oldest rocks, since Earth constantly recycles rock. (00:10:42)
    1 Australia · 2 South Africa

  • 2025-09-12 · This Might Actually be Happening · Hank, 5 named — Hank's favourite example: when were atoms discovered? With Democritus's philosophy, Dalton and Lavoisier's whole-number chemistry, Einstein's Brownian-motion math, or Max von Laue's first X-ray diffraction images? (00:16:15)
    1 Democritus · 2 John Dalton · 3 Antoine Lavoisier · 4 Albert Einstein · 5 Max von Laue

  • 2025-10-02 · You are Probably Underestimating Jane Goodall’s Impact · Hank, 4 named — Hank says animal culture and politics are now supported by rigorous data: elephants bury their dead, dolphins teach hunting, crows pass knowledge on, postmenopausal orcas guide their pods. (00:10:10)
    1 elephant · 2 dolphin · 3 crow · 4 killer whale “orcas”

  • 2025-10-09 · I Like Being Alive · John, 2 named — John says the Broccoli Tree in Sweden and the Sycamore Gap tree in Britain were cut down, but both have since sprouted new life from their felled trunks. (00:03:06)
    1 Broccoli Tree · 2 Sycamore Gap tree

  • 2025-12-05 · Why Don't Rockets Melt Themselves · Hank, 3 named — The guide names Buzz Aldrin and Neil Armstrong as the astronauts who walked on the Moon. (00:05:32)
    1 Buzz Aldrin · 2 Neil Armstrong · 3 Michael Collins

2026

  • 2026-02-27 · Can We Do a Science Together?? · Hank, 2 named — Hank says Wikipedia has a list of notable people and fictional characters plus public pageview data that can stand in for how famous each is. (00:03:09)
    1 Eddie Murphy · 2 Eddie Cochran

  • 2026-04-03 · I Had a Hallucination This Week · Hank, 2 named — Hank suggests the reason may be that atoms are not an exclusive club: the Grand Canyon and Valles Marineris are just atoms, as are most things (not neutron stars). (00:02:14)
    1 Grand Canyon · 2 Valles Marineris

  • 2026-10-07 · The 5 Meanest Things We've Named a Species · Hank, 4 named — Hank says the moth called the Uncertain, the exasperating platynota, the confused moth and the confused flour beetle are named for scientists' difficulty telling them from similar species. (00:02:26)
    1 The Uncertain · 2 exasperating platynota · 3 confused moth · 4 confused flour beetle

  • 2026-10-07 · The 5 Meanest Things We've Named a Species · Hank, 5 named — Top five meanest names: bone-eating snot-flower worm, insignificant harp ground beetle, stinkpot, ugly worm lizard, sloth (00:05:04)
    1 Osedax mucofloris “bone eating snot flower worm” · 2 insignificant harp ground beetle · 3 eastern musk turtle “stinkpot” · 4 ugly worm lizard · 5 sloth (concept) “Sloths”

  • 2026-10-20 · Correcting a Mistake in Everything Is Tuberculosis · 50 x 50 Science · John, 2 named — Tuberculosis is treated with combination therapy, several antibiotics acting differently: isoniazid attacks the cell wall as it forms, while rifampin enters the cell and disrupts its RNA synthesis. (00:04:52)
    1 isoniazid · 2 rifampicin “rifampin”