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NPR's national political correspondent Mara Liasson gives us analysis of the news around the resignation of Kirstjen Nielsen from the Department of Homeland Security.

NPR's Michel Martin speaks with Congressman Joaquin Castro about the resignation of Kirstjen Nielsen, the director of the Department of Homeland Security.

Emergency dispatchers play a key role when people go into cardiac arrest, but there are no national requirements that they be trained in telephone CPR.

A variety of genetic tests are available to screen both fetus and parents. One option that's growing in popularity is called an expanded carrier screening. The results can be useful and overwhelming.

Migrants from Central America who end up in the U.S. must cross the Guatemala-Mexico border, where immigration control is light to nonexistent. Quicker journeys are spurring more illegal immigration.

Viruses are everywhere and not just the computer kind. Summer and winter we are surrounded by people coughing and sneezing, and we spend far too much time…

Big Cypress National Preserve announced it has caught the largest python ever to be removed from the swamp.

The synthetic opioid fentanyl is 50 times more powerful than heroin and can easily be fatal. A new study shows fentanyl now kills black people in…

Memory faltering as you age? Parts of your brain that used to work in sync may be out of step. A study shows that a precise jolt of electricity can bring these parts back together, boosting memory.

Homecoming is set for release on Netflix April 17, promising a close-up look at the often-guarded superstar in preparation for her momentous festival set.