If you happen to like our videos and have a few bucks to spare to support our efforts, check out our Patreon page where we've got a variety of perks for our Patrons, including Simon's voice on your GPS and the ever requested Simon Whistler whistling package: https://www.patreon.com/TodayIFoundOut →Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut Do Sharks Really Not Like How Humans Taste? https://youtu.be/i1O6-3izkTo?list=PLR0XuDegDqP2yEk58fgohft2Z1nhcmwis Why Crocodiles Shed Tears When They Eat https://youtu.be/iD3PYXIzAOY?list=PLR0XuDegDqP2yEk58fgohft2Z1nhcmwis 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-teet