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There's a new fear from climate change: bacteria and viruses buried in frozen ground coming back to life as the Arctic warms up. We went digging in permafrost to find out how worried we should be.

Bernie Sanders won sweeping victories Saturday, and more are sure to come over the next couple of months. Can he win the nomination? And is that what really even matters?

Illinois, Wisconsin, New Hampshire and Pennsylvania top list of Senate seats most likely to change hands — and they're all currently Republican-controlled.

Growing up, as the searing pain of a sickle cell crisis would spread through her veins, Tanjila Bolden-Myers would ask her mother if this time, it would...

Audits show Medicare potentially overpaid five insurance plans by $128 million, yet the government recovered only $3 million. The finding adds to questions about oversight of Medicare Advantage plans.

China's Super League is signing international stars for huge sums. Given government interest, investor enthusiasm and an enormous potential fan base, could Chinese soccer be the sport's next force?

Boston, San Francisco, London, Sydney — D.C.'s massive protest has spawned sister marches in all 50 states and hundreds of cities across seven continents. Here's a glimpse of some of the biggest.

Burnett is married to a man just a wee bit younger than she is, so we're asking her three questions about big cats. Originally broadcast Oct. 10, 2015.

An overview of multiple legal challenges and protests since the U.S. Army Corps of Engineers considered approving a section of the pipeline near the Standing Rock Sioux Reservation in North Dakota.

Moore, who died Friday, was seen as a hero for his role in the first major land battle in Vietnam. He later co-authored the book, We Were Soldiers Once ... and Young. Originally broadcast in 1992.