Podcast: A Dragonfly Mystery, Deformed Mammoths, and Why Dark Pigeons Rule Cities

How can dragonflies smell, even without smell centers in their brains? Can a mammoth deformity shed light on why these ancient beasts went extinct? And why do darker colored pigeons have a leg up in cities? Science's Online News Editor David Grimm chats about these stories and more with Science's Sarah Crespi.

A Dragonfly Mystery, Deformed Mammoths, and Why Dark Pigeons Rule Cities