For the first time, a mammal species is extinct because of human-induced climate change

Earth's tiniest porpoise approaches extinction

How to share Earth with other animals

Ancient flower discovered in fossilized resin could be 45 million years old

10 animals presumed extinct in the last decade

7 titanic facts about 'The Titanosaur'

Meet the planet's 25 most endangered primates

Farmer discovers woolly mammoth near Detroit

Ginseng demand boosts prices and poaching

Students revive extinct squash with 800-year-old seeds

Flea fossil may hold ancestor of bubonic plague

Which U.S. states have the most endangered species? [Infographic]