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Getting DNA into plant cells is tricky. Researchers have tried using infectious bacteria, as well as gene guns that shoot gold bullets. Then a physicist came up with a new approach almost by accident.

NPR's Michel Martin speaks with Congressman Chris Stewart of Utah.

NPR's Scott Simon speaks with Rep. Raja Krishnamoorthi, D-Ill., about the end of the special counsel Robert Mueller's investigation.

A contrast agent doesn't make you feel better or treat what's ailing you. But by making CT scans clearer, contrast might be crucial in helping your doctor make the right diagnosis.

Rachel Martin talks to Norbert Rottgen, chairman of Germany's Foreign Affairs Committee, about the Brexit delay, and what kind of leverage Europe has in negotiations.

Millions signed up for health insurance through state exchanges and HealthCare.gov. But another several million bypassed the exchanges and bought health coverage directly from insurers.

It has been one week since a mass shooter attacked two mosques in Christchurch and killed 50 people. Steve Inskeep talks to Hady Osman about his friend, a soccer player, who was buried Friday.

Deep in Oregon’s sagebrush country, there’s one county with an abundance of ravens. Biologists say those ravens like to eat sage grouse eggs, and they’ve come up with plans to take care of the raven problem. That’s got bird advocates questioning whether killing one bird for the sake of another is the right move.

"The condition of the jail is such that it does not comply with constitutional standards," Nowata County Sheriff Terry Sue Barnett told reporters after tendering her resignation.

Civil rights and faith leaders are demanding a meeting with the FBI director. The message: time to prioritize white nationalist violence.