SciShow: Why Can't I Grow More Teeth?

Teacher or professor: SciShow
Subject: Science
Content of the Lesson: How come sharks get to have endlessly regrowing teeth when humans only get one set our entire lives? And how come some other mammals get to cheat the system? From elephants to baboons, we'll learn why teeth don't grow back. Hosted by: Stefan Chin (he/him) ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Matt Curls, Alisa Sherbow, Dr. Melvin Sanicas, Harrison Mills, Adam Brainard, Chris Peters, charles george, Piya Shedden, Alex Hackman, Christopher R, Boucher, Jeffrey Mckishen, Ash, Silas Emrys, Eric Jensen, Kevin Bealer, Jason A Saslow, Tom Mosner, Tomás Lagos González, Jacob, Christoph Schwanke, Sam Lutfi, Bryan Cloer ---------- Looking for SciShow elsewhere on the internet? SciShow Tangents Podcast: https://scishow-tangents.simplecast.com/ TikTok: https://www.tiktok.com/@scishow Twitter: http://www.twitter.com/scishow Instagram: http://instagram.com/thescishowFacebook: http://www.facebook.com/scishow #SciShow #science #education #learning #complexly ---------- Sources: https://onlinelibrary.wiley.com/doi/full/10.1111/joa.13248 http://jysire.free.fr/PDF/PDF%202006-2010/2007%20Review%20CTO-Sire.pdf https://pubmed.ncbi.nlm.nih.gov/22577071/ https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1365-2028.1980.tb00643.x https://www.degruyter.com/document/doi/10.1515/mamm.1984.48.1.105/html https://www.iflscience.com/can-scientists-regrow-teeth-yet-68941 https://stemcellres.biomedcentral.com/articles/10.1186/s13287-021-02461-z https://www.jstor.org/stable/3599309 https://www.nature.com/articles/ijos201336 https://journals.biologists.com/dev/article/139/19/3487/45272/Tooth-shape-formation-and-tooth-renewal-evolving https://www.sciencedirect.com/science/article/pii/B9780128028186000053#bib26 https://www.jstor.org/stable/1381759 https://www.pnas.org/doi/abs/10.1073/pnas.1109615108 https://anatomypubs.onlinelibrary.wiley.com/doi/full/10.1002/ar.21011 Image Sources: https://www.gettyimages.com/detail/video/slow-motion-of-sea-waves-washing-northern-sandy-beach-stock-footage/1441042287 https://www.gettyimages.com/detail/photo/shark-teeth-royalty-free-image/96924740 https://www.gettyimages.com/detail/video/wide-sincere-smile-of-a-young-man-close-up-positive-stock-footage/1287943312 https://commons.wikimedia.org/wiki/File:BC-095-Great-White-Jaw-r2-Lo.jpg https://www.gettyimages.com/detail/photo/happiness-royalty-free-image/882495390 https://www.gettyimages.com/detail/photo/australopithecus-afarensis-royalty-free-image/1455261218?phrase=australopithecus+skull&adppopup=true https://www.gettyimages.com/detail/video/dentist-shows-artificial-jaw-in-dental-office-stock-footage/1471762444 https://www.gettyimages.com/detail/video/belemnite-ancient-fossil-and-fossil-shark-tooth-the-stock-footage/1336095332 https://www.gettyimages.com/detail/video/female-shark-mouth-and-teeth-with-baby-shark-stock-footage/589140038 https://www.gettyimages.com/detail/photo/great-white-shark-smiling-royalty-free-image/515714114 https://www.gettyimages.com/detail/video/young-man-eating-chicken-wing-fast-food-stock-footage/1308239468 https://commons.wikimedia.org/wiki/File:Spotted_Hyena_(Crocuta_crocuta)_dentition_(6645884245).jpg https://commons.wikimedia.org/wiki/File:Dog_skull_(MAV)_03.jpg https://www.gettyimages.com/detail/video/closeup-dog-jumps-for-bacon-treat-slow-motion-stock-footage/1157672182 https://www.gettyimages.com/detail/video/baboon-monkey-stock-footage/472722643 https://www.gettyimages.com/detail/video/angry-savanna-baboon-in-fight-with-group-stock-footage/1463230769 https://www.gettyimages.com/detail/photo/going-ape-royalty-free-image/92156507 https://www.gettyimages.com/detail/photo/surprised-ring-tailed-lemur-with-open-mouth-and-royalty-free-image/1022874582 https://www.gettyimages.com/detail/photo/sunda-flying-lemur-royalty-free-image/465090913 https://www.gettyimages.com/detail/photo/close-up-front-portrait-of-hyrax-royalty-free-image/878477408 https://www.gettyimages.com/detail/illustration/green-monstera-plant-leaves-background-royalty-free-illustration/1419396873 https://en.wikipedia.org/wiki/File:Lemur_catta_toothcomb.jpg https://www.gettyimages.com/detail/photo/panoramic-radiography-by-means-of-x-rays-showing-royalty-free-image/1439798958 https://www.gettyimages.com/detail/video/veterinarian-conducting-examination-of-black-labrador-stock-footage/1327169605 https://www.gettyimages.com/detail/video/close-up-of-a-wild-elephant-eating-from-a-tree-in-the-stock-footage/1255369798 https://www.gettyimages.com/detail/photo/elephant-mouth-wide-open-royalty-free-image/597655992?phrase=elephant+mouth&adppopup=true https://commons.wikimedia.org/wiki/File:Silvery_mole-rat.png https://tinyurl.com/49nzafae https://commons.wikimedia.org/wiki/File:Heliophobius_argenteocinereus_01_MWNH_324.jpg


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