Putting an end to a mass extinction sounds like an impossible task, but some researchers argue that doing so would be setting ...

Surprising new fossil evidence undermines the idea that there was ever a mass extinction on land – and may force us to ...

Millions have seen the heart-wrenching video of a polar bear clinging to life, its white hair limply covering its thin, bony frame. Shot by Paul Nicklen and Cristina Mittermeier of the nonprofit ...