The Greenland shark is ugly. Its eyes look cloudy and dead. Its snout and fins are stubby. Its meat is poisonous. And that may be part of why most people have overlooked these sharks for so long. But there was a rumor circulating among Greenland villagers that this deepsea dweller could survive for centuries. Scientist John Steffensen went on a hunt to see if this was true and discovered that the Greenland shark can live for more than 500 years, making it the longest living vertebrate on the planet. Biologist Steve Austad explains how the shark avoids death for so long and discovers that its secret to longevity comes at a cost. It seems that to live a longer life, it opts out of some of the best stuff life has to offer: adventure, friends and companionship.

Terrestrials was created by Lulu Miller with WNYC Studios. This episode was produced by Brenna Farrel, and Mira Burt-Wintonick, with help from Alan Goffinski, Ana González, Tanya Chawla, Sarah Sandbach, Valentina Powers, and Joe Plourde. Fact-checking by Natalie Middleton.

Our advisors are Ana Luz Porzecanski, Andy J. Pizza, Anil Lewis, Dominique Shabazz, Liza Demby, Princess Daazhraii Johnson and Tara Welty.

Learn more about storytellers, listen to music, and dig deeper into the stories you hear on Terrestrials with activities you can do at home or in the classroom on our website, Terrestrialspodcast.org. Badger us on social media: @radiolab and #TerrestrialsPodcast or by emailing us at terrestrials@wnyc.org.

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Support for Terrestrials is provided by the Simons Foundation, the Arthur Vining Davis Foundations, the Kalliopeia Foundation and the John Templeton Foundation.