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Following on Cassini's discoveries, NASA aims to probe Jupiter's Europa for potential life. With every new world we discover, we should look back at our own planet with awe, says Marcelo Gleiser.

U.S. winter Olympians — whose sports can defy gravity and involve breakneck speeds on snow and ice — share some of their most common nightmares in a special NPR Up First podcast from Pyeongchang.

NPR's Noel King talks to USA Today sports columnist Christine Brennan about the gender equity gap exposed by the NCAA's March Madness tournaments, and what should be done about it.

New research found that wearing a cloth mask over a medical mask significantly boosts protection against droplets that can transmit the virus. Knotting the ear loops of surgical masks also helps.

Ayatollah Ali Khamenei, Iran's supreme leader, said Sunday that all U.S. sanctions must end before Tehran will return to its commitment under the 2015 nuclear accord.

As she takes the helm of the World Trade Organization, the former Nigerian finance minister faces challenges from COVID-19 response to navigating trade frictions between the U.S. and China.

With President Biden and other Democratic leaders in their 70s and 80s, the new chairman of the Democratic National Committee says recruiting younger candidates will be among his top priorities.

North Korea's bombastic propaganda and unpredictable leadership have made it a topic of frequent parody. But experts say it's time to take the nation's nuclear capabilities more seriously.

The U.S. government will borrow all of the money used to pay for the $1.9 trillion COVID-19 relief bill. That kind of borrowing used to set off major alarms with economists. Now? Not so much.

Senate Majority Leader Chuck Schumer unveiled the plan that would begin a lengthy process of writing partisan spending bills. The plan omits the debt ceiling, which must be increased by Oct. 1.