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Infectious disease expert Dr. Teena Chopra answers questions about the spread and containment of the virus behind COVID-19.

An NPR science correspondent answers listener questions about the search for medical treatments to fight the coronavirus.

The House of Representative Budget Committee chairman Paul Ryan says he sees hope for a bipartisan budget agreement for the first time since President Obama came to office.

North Korea has claimed to have tested a hydrogen bomb, which is far more powerful than an atomic bomb. Experts think they may have pulled it off.

We ask the director, writer and producer three questions about a country that he isn't from. Originally broadcast Sept. 6, 2013.

Emergency physician Dr. Leana Wen and NPR investigations correspondent Sacha Pfeiffer answer more listener questions about pregnancy and birth during the COVID-19 epidemic with NPR's Michel Martin.

Emergency physician Dr. Leana Wen and NPR investigations correspondent Sacha Pfeiffer answer listener questions about pregnancy and birth during the COVID-19 epidemic with NPR's Michel Martin.

An NPR science correspondent answers listener questions about testing for COVID-19, immunity and how testing capacity affects plans to reopen the country.

The Army's Crusader artillery system may be losing its last battle with Defense Secretary Donald Rumsfeld unrelenting in his new determination to cancel the program. Tom Cjelten reports.

The new pope was elected on Thursday by cardinals voting in their second ballot.