Primatologist Dame Jane Goodall was born in London, but she is probably most at home in Africa. She first arrived in what is now Tanzania in 1960 and devoted her next 45 years to studying the behavior of chimpanzees in the wilds. Goodall continues her good work with this encouraging, fact-filled narrative about what has been done to revive endangered species of the world. Writing about examples as far-flung as the North American whooping crane and the Mongolian miniature horse, she explains the radical responses that breakdowns in ecosystems often necessitate. Her approach to these problems is positive, but Goodall is no cock-eyed optimist: She addresses the very real environmental problems that plague every creature on the planet, including ourselves.