TED-Ed

Discover the evolutionary purpose of nails, and explore the theories of why they evolved from claws over 55 million years ago. -- Consider the claw. Frequently found on animals around the world, it’s one of nature’s most versatile tools. Bears use claws for digging as well as defense. An eagle’s needle-like talons can pierce the skulls of their prey. Even the ancestors of primates used to wield these impressive appendages, until their claws evolved into nails. So what caused this adaptation? Matthew Borths investigates. Lesson by Matthew Borths, directed by Augenblick Studios. Animator's website: https://www.augenblickstudios.com Sign up for our newsletter: http://bit.ly/TEDEdNewsletter Support us on Patreon: http://bit.ly/TEDEdPatreon Follow us on Facebook: http://bit.ly/TEDEdFacebook Find us on Twitter: http://bit.ly/TEDEdTwitter Peep us on Instagram: http://bit.ly/TEDEdInstagram View full lesson: https://ed.ted.com/lessons/claws-vs-nails-matthew-borths Thank you so much to our patrons for your support! Without you this video would not be possible! Jose Arcadio Valdes Franco, Brandy Sarver, Guy Hardy, Tu-Anh Nguyen, Karl Laius, Madee Lo, JY Kang, Marc Bou Zeid, Abhishek Goel, Charles A Hershberger, Coenraad Keuning, Robert Seik, Heidi Stolt, Alexis Hevia, Todd Gross, Brady Jones, Christina Salvatore, Zhong Ming Zenny Tan, Karisa Caudill, Bruno Pinho, Derek Drescher, Mihail Radu Pantilimon, Amin Shahril, Mohamed Elsayed, Barthélémy Michalon, Chumi Ogbonna, Karlee Finch, Mohammad Said, jj5252, Kelvin Lam, Mauricio Basso, Athena Grace Franco, Tirath Singh Pandher, Melvin Williams, Tsz Hin Edmund Chan, Nicolas Silva, Raymond Lee, Kurt Almendras, Denise A Pitts, Abdallah Absi, Dee Wei, Richard A Berkley, Tim Armstrong, Daniel Nester, Hashem Al, denison martins fernandes, Doug Henry, Arlene Spiegelman, Michał Friedrich and Joshua Wasniewski.