Why do zebras have stripes?

Gilda Berger, Melvin Berger

Addresses 20 animal characteristics in question-and-answer format, including why giraffes have such long necks, why opposums play dead, and whether or not horses can sleep standing up. This book provides scientific answers to twenty questions about animals, including why wolves howl, why elephants swing their trunks, why rabbits wiggle their nose, and more. The coauthor is Melvin Berger.