

SciShow Tangents
Complexly
SciShow Tangents is the lightly competitive knowledge showcase from the geniuses behind the YouTube series SciShow. Every other Tuesday, join Hank Green, Ceri Riley, and Sam Schultz as they try to one-up and amaze each other with weird and funny scientific research... while not getting distracted. There will be tangents about video games, music, weird smells, surprisingly deep insights about life, and of course, poop, but it always comes back to the science.
Episodes
Mentioned books

Mar 22, 2022 • 36min
Homes
From shells to hives to holes in the ground, most animals have a place to call home. And today, we're paying them all a visit! So open up, cause Science is knocking and it needs to use your bathroom!Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Trivia Question]Machine learning saving kilowatt-hourshttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765259/[Fact Off]Cichlid fish dream houses (for conservation) https://www.mpg.de/14854482/3d-printing-cichlidshttps://www.smithsonianmag.com/innovation/if-fish-could-build-its-own-home-what-would-it-look-like-180976172/Devil’s garden - lemon ant & rainforest tree symbiosis https://news.stanford.edu/news/2005/september28/devil-092805.htmlhttps://www.nature.com/articles/437495ahttps://www.journals.uchicago.edu/doi/abs/10.1086/606022?journalCode=anhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124481/https://www.jstor.org/stable/2459556[Ask the Science Couch]Estimate of how many animals there arehttps://www.nationalgeographic.com/newsletters/animals/article/how-many-species-have-not-found-december-26https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001127https://academic.oup.com/sysbio/article/61/5/871/1734723Animals that are parasites https://royalsocietypublishing.org/doi/10.1098/rsbl.2016.0324https://www.nationalgeographic.com/animals/article/animals-evolution-parasites-ed-yonghttps://www.audubon.org/news/the-brilliant-ways-parasitic-birds-terrorize-their-victimsConstructing homes (natural & artificial)https://www.naturepl.com/pictures/pdfs/NPL_Architecture.pdfhttps://pubmed.ncbi.nlm.nih.gov/34269510/ [Butt One More Thing]Snail shell poop + African swine fever virushttps://pubmed.ncbi.nlm.nih.gov/35151121/https://www.carnegiemnh.org/science/mollusks/dietbehavior.html Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Mar 15, 2022 • 36min
Green
Grass... money... Ninja Turtles... some of the best things in the world are all the same color: green! This week, we're taking a deeper look at this most verdant of colors. Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Definition]https://www.wired.com/2012/06/the-crayola-fication-of-the-world-how-we-gave-colors-names-and-it-messed-with-our-brains-part-ii/ [Truth or Fail][Trivia Question]Green spaces reduce systolic blood pressurehttps://www.sciencedirect.com/science/article/abs/pii/S0048969721075914?via%3Dihubhttps://www.cdc.gov/bloodpressure/about.htm#:~:text=The%20second%20number%2C%20called%20diastolic,%E2%80%9C120%2F80%20mmHg.%E2%80%9D[Fact Off]Green glacier mysteryhttps://www.nationalgeographic.com/science/article/icebergs-can-be-emerald-green-now-we-know-why?loggedin=truehttps://www.eurekalert.org/news-releases/859296Emerald ash borer pest control by biomimicry and electrocutionhttps://ag.umass.edu/landscape/fact-sheets/emerald-ash-borerhttps://www.aphis.usda.gov/aphis/resources/pests-diseases/hungry-pests/the-threat/emerald-ash-borer/emerald-ash-borer-beetlehttps://www.nature.com/articles/s41598-017-01496-8https://www.psu.edu/news/research/story/femme-fatale-emerald-ash-borer-decoy-lures-kills-males/https://www.pnas.org/doi/full/10.1073/pnas.1412810111[Ask the Science Couch]U.S. green paper moneyhttps://www.bankofcanadamuseum.ca/2019/02/the-canadian-roots-of-the-greenback/https://www.visitthecapitol.gov/exhibitions/artifact/hr-240-legal-tender-act-february-25-1862https://www.moneyfactory.gov/resources/faqs.htmlhttps://www.scientificamerican.com/article/important-improvement-in-bank-note/https://cite.case.law/barb/56/84/https://cite.case.law/barb/56/96/[Butt One More Thing]Orb weaver buttshttps://commons.wikimedia.org/wiki/File:Spider_-_Eriophora_nephiloides,_Caves_Branch_Jungle_Lodge,_Belmopan,_Belize.jpghttps://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=4263&context=etd Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Mar 8, 2022 • 43min
Computers
Back in my day, a computer was a computer: It was big, tan, and was plugged into your living room wall. But now we've got computer cars, computer phones, even computer lightbulbs! And that's great! But I think we better keep an eye on them all, just in case...Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Mar 1, 2022 • 43min
Venus
We kick off Season 4 by getting up close and personal with Earth's other, less popular, more mysterious neighbor: Venus!Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Trivia Question]Venera missionshttps://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1970-060Ahttps://nssdc.gsfc.nasa.gov/planetary/chronology_venus.html[Fact Off]Venus tables & Maya Codex of Mexicohttps://www.mesoweb.com/articles/Coe_etal/Fourth_Codex.pdfhttps://www.brown.edu/news/2016-09-07/mayacodexhttps://www.inah.gob.mx/boletines/7497-inah-ratifica-al-codice-maya-de-mexico-antes-llamado-grolier-como-el-manuscrito-autentico-mas-antiguo-de-americahttps://www.news.ucsb.edu/2016/017062/mayan-momentPhosphene/ammonia on Venus (and microbial life possibility)https://www.eurekalert.org/news-releases/938538https://news.mit.edu/2020/life-venus-phosphine-0914https://www.nytimes.com/2020/09/14/science/venus-life-clouds.htmlhttps://news.mit.edu/2021/newer-nimbler-faster-mission-venus-search-signs-life-clouds-sulfuric-acid-1210https://venuscloudlife.com/venus-life-finder-mission-study/https://pubmed.ncbi.nlm.nih.gov/7381915/https://www.pnas.org/content/118/52/e2110889118[Ask the Science Couch]Pictures of the surface of Venushttps://nssdc.gsfc.nasa.gov/imgcat/html/object_page/v09_lander_proc.htmlhttps://solarsystem.nasa.gov/missions/venera-13/in-depth/https://www.nasa.gov/feature/goddard/2022/sun/parker-solar-probe-captures-its-first-images-of-venus-surface-in-visible-light-confirmedhttps://www.youtube.com/watch?v=5ueMGZTezfYhttps://airandspace.si.edu/exhibitions/exploring-the-planets/online/solar-system/venus/magellan.cfmhttps://svs.gsfc.nasa.gov/3728https://www.nasa.gov/content/goddard/parker-solar-probe-instruments[Butt One More Thing]Venus cloacina goddesshttps://drainfast.co.uk/blog/cloacina-goddess-sewers/https://books.google.com/books?id=SYqFBwAAQBAJ&pg=PA128#v=onepage&q&f=false Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Feb 22, 2022 • 30min
SciShow Tangents Classics - The Internet
Season 3 has come to a close, and the Tangents crew is taking a week off. While we scour the World Wide Web for all new, mind-blowing science facts, enjoy this classic episode about the Internet!Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscriber Garth Riley for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Feb 15, 2022 • 45min
Butts
It's all led up to this! We usually relegate our butt facts to the end of episodes, but this week we're giving butts the respect they deserve. It's butts all the way down, baby!Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Feb 8, 2022 • 37min
Hands & Feet
The Season 3 finale draws ever nearer, but before we get to that big beautiful Butt episode, we need to make a detour to those nifty tools on the ends of our limbs: hands and feet!Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Trivia Question]Heel-toe or toe-heel runninghttps://pubmed.ncbi.nlm.nih.gov/31525171/[Fact Off]Trench foot and (possibly, tenuously) water balloonshttps://www.ncbi.nlm.nih.gov/books/NBK482364/https://www.wemjournal.org/article/S1080-6032(06)70334-9/fulltexthttps://apps.dtic.mil/sti/citations/AD0666752https://www.sciencedirect.com/science/article/pii/B978012821606400017Xhttp://content.time.com/time/specials/packages/article/0,28804,2049243_2048654_2049039,00.html[Ask the Science Couch]Nail care evolution/historyhttps://www.britannica.com/story/how-do-monkeys-and-apes-trim-their-fingernailshttps://theconversation.com/curious-kids-why-do-we-have-fingernails-and-toenails-110989https://www.floridamuseum.ufl.edu/science/ancient-primates-had-grooming-claws/https://www.sciencedirect.com/science/article/abs/pii/S0047248417305134https://tedium.co/2017/02/07/fingernail-trimming-history/[Butt One More Thing]Bidets and poopy handshttps://pubmed.ncbi.nlm.nih.gov/29709985/ Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Feb 1, 2022 • 39min
Heads
Season 3 of Tangents is drawing to a close, and we're celebrating by taking a long, top to bottom (literally) look at bodies! To kick us off, we'll be appreciating that brain-holding, eye-having, mouth-possessing orb on top of almost all necks on Earth: the head. Thank you, the head! Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Trivia Question]Embalming head diameterhttps://www.sciencedirect.com/science/article/abs/pii/S0021929009001444?via%3Dihub[Fact Off]Chicken heads for rabies oral vaccineshttps://www.theatlantic.com/science/archive/2015/12/that-time-europe-air-dropped-vaccine-loaded-chicken-heads-to-bait-rabid-foxes/417951/ https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1439-0450.1982.tb01237.xhttps://pubmed.ncbi.nlm.nih.gov/31927421/https://books.google.co.in/books?id=mUu6o7SiSZ8C&lpg=PA71&ots=SlWS7Vyp4u&dq=getting+rid+of+rabies+switzerland&pg=PA71&hl=en#v=onepage&q&f=falsehttp://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.500.9910&rep=rep1&type=pdfhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3614052/Alligator stick hats https://www.washingtonpost.com/national/health-science/crocodiles-and-their-ilk-may-be-smarter-than-they-look/2013/12/06/1084cf28-5d2c-11e3-bc56-c6ca94801fac_story.htmlhttps://www.nationalgeographic.com/science/article/what-do-croc-tools-mean-for-dinosaur-innovation?loggedin=truehttps://www.livescience.com/41898-alligators-crocodiles-use-tools.htmlhttps://blogs.scientificamerican.com/laelaps/alligators-dont-play-pick-up-sticks-to-lure-lunch/https://www.newscientist.com/article/dn24750-zoologger-alligators-use-tools-to-lure-in-bird-prey/[Ask the Science Couch] Blood-brain barrierhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4292164/https://www.rndsystems.com/research-area/blood--brain-barrier-permeabilityhttps://sites.duke.edu/apep/module-2-the-abcs-of-intoxication/content-getting-alcohol-to-the-brain-crossing-the-blood-brain-barrier/https://bmcneurol.biomedcentral.com/articles/10.1186/1471-2377-9-S1-S3https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3494002/[Butt One More Thing]Amblyopsidae/cavefish head anushttps://www.discovermagazine.com/planet-earth/scientist-names-blind-fish-with-neck-anus-after-his-favorite-teamhttps://zookeys.pensoft.net/articles.php?id=3824http://webhome.auburn.edu/~armbrjw/Amblyopsidae.pdf Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Jan 25, 2022 • 37min
Birds of Prey
The pointiest birds in the wild blue yonder finally get their due! Join us to learn all of these lethal birds killer secrets, and to discover their hidden softer sides. Some use teamwork! Some keep pets! Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscriber Garth Riley for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen [Definition]https://bioone.org/journals/journal-of-raptor-research/volume-53/issue-4/0892-1016-53.4.419/Commentary-Defining-Raptors-and-Birds-of-Prey/10.3356/0892-1016-53.4.419.full [Trivia Question]Alkyl mercury in goshawkshttps://link.springer.com/article/10.1007%2Fs10646-013-1128-zhttps://www.jstor.org/stable/4312117?casa_token=3PPQWWTwiYAAAAAA%3A7giiI7DEJGZCee8kh5vBBGP51efUFHyxLFdfDGHESY1plAdhTZLY8F5sua8iP5JMNYzhZaNZRjWpC9gYSiKEeZo5sU_BxcEbUk38ZTwCEA37g9mOpHo&seq=1#metadata_info_tab_contents[Fact Off]Bald eagle cyanobacteria toxin mysteryhttps://www.livescience.com/eagle-killing-mystery-disease-solved.htmlhttps://www.inverse.com/science/mystery-behind-mass-bald-eagle-deaths-solvedScreech owls & threadsnakeshttps://www.audubon.org/news/what-would-screech-owl-want-blind-snakehttps://www.jstor.org/stable/4218201?seq=1#page_scan_tab_contentshttps://landscapeipm.tamu.edu/what-is-ipm/ipm-concepts/pest-identification/good-bug-bad-bug/neither/texas-blind-snake/http://www.digimorph.org/specimens/Leptotyphlops_dulcis/https://www.audubon.org/field-guide/bird/eastern-screech-owl[Ask the Science Couch]Harris’s hawks (social raptors)https://www.allaboutbirds.org/guide/Harriss_Hawk/overviewhttps://www.audubon.org/field-guide/bird/harriss-hawkhttps://bioone.org/journals/the-auk/volume-130/issue-3/auk.2013.120063/Reexamining-Cooperative-Hunting-in-Harriss-Hawk-Parabuteo-unicinctus--Large/10.1525/auk.2013.120063.full[Butt One More Thing]Anthrax in raptor cloacashttps://pubmed.ncbi.nlm.nih.gov/17347404/ Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Jan 18, 2022 • 38min
Yeast
These little, bubbly guys help us make such perennial favorites as 'bread' and 'beer.' If you're saying to yourself "what is yeast, Alex," I got good news for you: you're right! Come learn about the microscopic fungus amung us on this week's Tangents!Head to https://www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!A big thank you to Patreon subscriber Garth Riley for helping to make the show possible!Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen[Trivia Question]Yeast mitotic arresthttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4255140/[Fact Off]Stinking hellebore flower and yeast relationshiphttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC2871880/https://www.newscientist.com/article/mg20527473-900-stinky-flower-is-kept-warm-by-yeast-partner/#ixzz7HEPFjzKBFruit fly and yeast relationshiphttps://www.cell.com/cell-reports/fulltext/S2211-1247(14)00777-3https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0196440https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4556146/https://www.sciencedirect.com/science/article/abs/pii/0300962983906011https://www.cell.com/current-biology/fulltext/S0960-9822(12)00075-9https://blogs.scientificamerican.com/guest-blog/fruit-flies-use-alcohol-to-self-medicate-but-feel-bad-about-it-afterwards/[Ask the Science Couch]History of yeasthttps://www.sciencedirect.com/topics/agricultural-and-biological-sciences/yeastshttp://www.faculty.umb.edu/gary_zabel/Courses/Spinoza/Texts/WAW%20Moll%20Antonie%20van%20Leeuwenhoek.htmhttps://books.google.com/books?id=gy_SAAAAMAAJ&pg=PA228&lpg=PA228https://books.google.com/books?id=XILwDwAAQBAJ&pg=PA72&lpg=PA72http://e-malt.com/statistics/ScientificDigest/Beginnings_of_microbiology_and_biochemistry_yeast_research.pdf Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.


