How long do whales live, and how do scientists figure out their age? What does it take to sustain a whale's enormous size? And why do whales have mustaches and belly buttons? Featuring Nick Pyenson, author of Spying on Whales and curator of marine mammal fossils for the Smithsonian.

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This episode originally aired on September 12, 2018.

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Photo by Chinh Le Duc via Unsplash. Thanks, Chinh!

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