What's the Secret Science Behind Whales?

Will and Mango pester their pal Nick with all their whale questions: Why are whales so large? How do they sustain those massive bodies? And also-- why do they have belly buttons? Featuring Nick Pyenson, author of Spying on Whales and curator of marine mammal fossils for the Smithsonian. Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htm And to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices