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A series of earthquakes in western Afghanistan have killed more than 2,000 people, according to government officials. We get an update from Fazel Qazizai, who has long worked with NPR in Afghanistan.

Researchers are testing exercise in people at high risk for Alzheimer's. The goal of a federally funded study is to learn whether aerobic physical activity can protect the brain.

A mouse's brain clears out toxins during periods of deep sleep — including toxins that form the sticky plaques associated with Alzheimer's disease. Could the same hold true for people?

NPR's Melissa Block speaks with Marc Rosenblum, the author of a new Migration Policy Institute study that found Obama's executive actions could protect some 87 percent from deportation.

Last year about 80,000 people in the United States died from the flu. Department of Health epidemiologist Jennifer Roth explained that the flu season…

A new study found that the risks apparently outweigh the benefits of taking a low-dose aspirin every day for otherwise healthy older people. But what about everyone else?

We take proactive measures to stop the spread of the flu — so, NPR's Michel Martin asks, why can't we combat gun violence the same way?

The warming climate means more intense rain and dangerous flash floods. In Austin, Texas, officials hope that letting people see the rising waters on their smartphones will help keep them safe.

The U.S. government said it had stopped implementing President Trump's executive order on immigration and refugees after a federal judge temporarily blocked it.

On Monday, the U.S. and Israel celebrate the opening of the American embassy in Jerusalem. The move is a blow to Palestinians, who seek part of the city as their capital.