Why Do Animals Become Extinct?

Book excerpt: The extinction of the dinosaurs may have been the result of an asteroid hitting Earth or an Ice Age freezing them to death. Today, animals such as elephants, zebras, tigers and leopards, some wolves, and many kinds of primates may still face extinction due to climate change, habitat loss, hunting, poaching, and pollution. This fascinating book introduces and explains the designations of endangerment--from extinct in the wild to vulnerable.