Humans vs. animals, a comparative study
Broadcast: Midmorning, 04/08/2009, 10:06 a.m.
A writer investigates what it means to be human by considering how much she is like certain animals. One example: like people, prairie dogs have an extended vocabulary of sounds.
- Hannah Holmes: is a science writer for Discovery Channel online. She's the author of a new book called "The Well-dressed Ape: A Natural History of Myself."