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Can Sharks Really Grow an Unlimited Number of Teeth

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 Biology   |   Science
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In this video:

While sharks aren’t exactly the ruthless predators most Hollywood features make them out to be (see: Do Sharks Really Not Like How Humans Taste?), they do possess a number of frighteningly efficient mechanisms to assist with aquatic hunting, including ultra-streamlined bodies, high intelligence, the ability to detect electrical fields and minute changes in water pressure, great hearing, incredibly sharp vision, amazing sense of smell (Lemon sharks can even detect tuna oil at a concentration of just one part per 25 million), and the topic of today- many rows of razor sharp teeth, including the ability to rapidly replace them. But are sharks actually able to grow an unlimited number of teeth throughout their lives?

Want the text version?: http://www.todayifoundout.com/index.php/2017/04/sharks-really-unlimited-amount-teeth/

Sources:

http://www.pnas.org/content/110/22/E2009.abstract
http://www.fossilguy.com/gallery/vert/fish-shark/remnant.htm
http://www.sciencedirect.com/science/article/pii/S1047847712001025
https://www.sheffield.ac.uk/news/nr/shark-teeth-human-tooth-loss-study-1.548598
http://www.nhm.ac.uk/our-science/science-news/2016/february/shark-genes-could-grow-new-human-teeth.html#sthash.qJKtMoxN.dpuf
http://www.sharksavers.org/en/education/biology/shark-teeth1/
http://wonderopolis.org/wonder/how-many-teeth-do-sharks-have
http://www.sharkwatchsa.com/en/blog/category/482/post/1206/white-shark-teeth-how-many/
http://www.sharkwatchsa.com/en/blog/category/482/post/1206/white-shark-teeth-how-many/
https://en.wikipedia.org/wiki/Shark_tooth
http://divers.neaq.org/2009/05/44-many-people-ask-why-do-sharks-have.php
https://www.usnews.com/news/articles/2013/05/13/alligators-can-grow-new-teeth-so-why-not-humans
https://en.wikipedia.org/wiki/Ivory
https://en.wikipedia.org/wiki/Dentin
https://en.wikipedia.org/wiki/Fish_scale#Placoid_scales
https://en.wikipedia.org/wiki/Great_white_shark
https://en.wikipedia.org/wiki/File:How_to_count_shark_teeth.png
http://www.bradenriverdentist.com/a-guide-to-shark-teeth/

Image Credit:

https://www.bigstockphoto.com/ru/image-46690357/stock-photo-attack-great-white-shark
https://www.bigstockphoto.com/ru/video-81436379/tiger-shark/
https://www.bigstockphoto.com/ru/image-143509985/stock-photo-lemon-shark-during-a-scuba-dive%2C-bahamas
https://www.bigstockphoto.com/ru/image-148112966/stock-photo-the-shark-with-an-open-mouth-and-big-teeth-floats-under-water-in-the-ocean
https://www.bigstockphoto.com/ru/image-149573378/stock-photo-row-of-shark-teeth-in-jaw
https://www.bigstockphoto.com/ru/image-4211310/stock-photo-bull-%D0%90%D0%BA%D1%83%D0%BB%D0%B0-%28%D0%97%D0%B0%D0%BC%D0%B1%D0%B5%D0%B7%D0%B8%29
https://www.bigstockphoto.com/ru/image-155059394/stock-photo-an-adult-shark-swimming-in-the-tank
https://www.bigstockphoto.com/ru/image-157703717/stock-photo-great-white-shark-%28carcharodon-carcharias%29-breaching-in-an-attack-hunting-of-a-great-white-shark-%28c
https://www.bigstockphoto.com/ru/image-153832307/stock-photo-row-of-shark-teeth-in-jaw
https://www.bigstockphoto.com/ru/image-109519376/stock-photo-mako-shark-jaw-showing-teeth
https://www.bigstockphoto.com/ru/image-118542536/stock-photo-shark-tooth
https://www.bigstockphoto.com/ru/image-59051036/stock-photo-great-white-shark-%28carcharodon-carcharias%29-breaching-in-an-attack
https://www.bigstockphoto.com/ru/image-140611751/stock-photo-great-white-shark-swimming-underwater
https://www.bigstockphoto.com/ru/image-92142101/stock-photo-shark
https://www.bigstockphoto.com/ru/image-148064156/stock-photo-row-of-shark-teeth-in-jaw
https://www.bigstockphoto.com/ru/image-159917972/stock-photo-aliwal-shoal%2C-indian-ocean%2C-south-africa%2C-sand-tiger-shark-%28carcharias-taurus%29
https://www.bigstockphoto.com/ru/image-114731663/stock-photo-sharks-teeth
https://www.bigstockphoto.com/ru/image-113213006/stock-photo-megalodon-shark-tooth

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