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Cuban leader Fidel Castro announced on Tuesday that he is stepping down as President of Cuba after 49 years in power. At 81, Castro will not seek re-election, and will transfer power to his brother, Raul. Guests discuss how Cubans are reacting to Castro's resignation.

The Trump administration's decision circumvents a ban Congress passed two years ago that prevents military bases from being named after anyone with ties to the Confederacy.

For the 2026 elections, NPR has collected deadlines and information on how to register to vote — online, in person or by mail — in every U.S. state and territory.

It's been more than a decade that several cities got federal funding for downtown streetcars. Some have flourished, others are faltering and at least one is fading out.

The mud- and rust-encrusted guns were discovered by accident as the Georgia riverbed was being dredged. Researchers suspect they came from British ships scuttled to the river bottom in 1779.

Engineers trying to get the flood water out of New Orleans face many challenges in their task. Communication is a major problem. So is transportation. The Army Corps of Engineers needs to build crude roads just to get workers to the breached sections of the levee system.

The International Atomic Energy Agency and its chief, Mohamed ElBaradei, receive the 2005 Nobel Peace Prize. Matthew Bunn, acting executive director of the Project on Managing the Atom at Harvard University's John F. Kennedy School of Government, discusses the U.N. watchdog group and its work.

Maine lobsterman and scientist Ted Ames tells host Melissa Block about how he has used his biochemistry background -- and a life on the ocean -- to study changing fish populations and develop sustainable fisheries management practices. Ames is one of the 2005 recipients of the MacArthur grants announced Tuesday.

Microorganisms play a vital role in growing food and sustaining the planet, but they do it anonymously. Scientists haven't identified most soil microbes, but they are learning which are most common.

Sea levels are rising even faster on the East Coast and Gulf Coast. And advances in climate science mean we can see the future clearly for the first time.