Podcast: Fossilized Turtle Sex, Remarkable Elephant Pregnancies, and the Evolution of Music

What can fossilized turtle sex tell us about ancient ecosystems? How do elephants stay pregnant for 22 months? And can natural selection be used to improve music? Science's Online News Editor David Grimm chats about these stories and more with Science's Sarah Crespi.

(Listen to the full Science podcast and more podcasts.)