Why Can’t I Grow More Teeth?

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