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A U.S. general says Russia has violated a longstanding arms control treaty by deploying new missiles. It was the first official, public assertion that these missiles are fully operational.

Thanks to the children of professor Robert E. Kelly, an interview about South Korea's political upheaval became one of the most popular things on the Internet on Friday.

They don't have wings, but bacteria sure can fly. Researchers at MIT say that tiny bubbles trapped by raindrops play a part in launching bacteria on long-distance flights.

House Minority Leader Nancy Pelosi told NPR's Robert Siegel she doesn't think President Trump "has the faintest idea" about health care.

The South by Southwest Interactive Festival, one of the first big tech conferences since the election, added a special track this year about tech under the Trump administration.

One day after saying diplomatic efforts "have failed" to affect North Korea, Secretary of State Rex Tillerson says the U.S. would consider all military options if compelled to act.

Neuroscientist Cori Bargmann is leading the new Chan Zuckerberg Initiative's $3 billion effort to cure or prevent "all diseases" by the end of this century. She talks about that daunting task.

The smartphone chipmaker has agreed to buy NXP Semiconductors for $38 billion. The deal allows Qualcomm to rely less on the smartphone industry. NXP makes semiconductors for cars.

Mumps spreads easily through schools and colleges. And in northwestern Arkansas, where the current outbreak is centered, students often live in close quarters with their families.

The Mormon Tabernacle Choir will perform at the inauguration of Donald Trump. That move is not going over well with some members of the Church of Jesus Christ of Latter-day Saints.