In a mass extinction event some 40,000 years ago, Australia lost 90% of its large species. New research suggests climate change played a much smaller role than once thought, though not all agree.

NPR's Mary Louise Kelly speaks to outgoing CIA Director Bill Burns about the handling of Russia, the Mideast, and security threats during his tenure, plus what lies ahead for the intel community.

Red flag warnings are in effect for parts of Los Angeles and Ventura counties, as the National Weather Service warns that ...

The World Health Organization leader worked with Carter for 20 years to fight the world's "neglected" diseases. After ...