Despite dire warnings for our endangered planet, Jane Goodall says all is not yet lost — we can change course if we act now.

Despite dire warnings for our endangered planet, Jane Goodall says all is not yet lost - we can change course if we act now. And she should know. Her tough-minded optimism comes from her work as the world's foremost authority on chimpanzees in Tanzania's Gombe National Park. As a scientist and naturalist, she has produced landmark studies of animal behavior that led to revolutionary insights into the evolution of human life. Now, traveling 300 days a year, she has become a global advocate for all life, challenging everyone to see ourselves as caretakers of the planet. Her new book, Hope for the Animals and Their World , features the heroic work of men and women working around the world to protect and preserve the earth.