Laurie Marker cuts down thorn bushes and gets farmers to change from herding dogs to guard dogs in her quest to protect cheetahs.

For the past 20 years, Cynthia Dobrez has perfected her formula for getting the middle-school students of Holland, Mich. excited to read.

Recipient of the 2010 Indianapolis Prize, zoologist Iain Douglas-Hamilton has spent the last 40 years protecting the elephants of Africa.

One farmer acts to save environment from factory farms.