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Turn out the lights for a good night of sleep: this seems like common sense, but many Americans don't actually follow it. New research shows it doesn't take much light at night to hurt our health.

Long-planned NATO exercises in Norway are preparing troops for arctic warfare — but they are taking place just miles from the Russian border, as tensions simmer over Ukraine.

About 300,000 American military personnel are expected to be deployed to the Persian Gulf -- the largest mobilization since Desert Storm. Among those with orders to deploy is one small unit, the Army's 85th Medical Division, with a unique mission: keeping soldiers mentally fit to fight under the stress of combat. NPR's Richard Knox reports from Fort Hood, Texas.

More than half of China's biggest cities are still under some form of lockdown measures. They're costing people economically and emotionally.

A new study based on thousands of DNA sequences and owner surveys finds that less than 10% of a dog's behavior — like howling, herding or retrieving — can be explained by its breed.

Yesterday, Netflix laid off some of its staff, many of them recently hired women of color. They were working on its new fan-focused website.

NPR's Sacha Pfeiffer speaks with Helen Wheeler, a wildlife ecologist from Anglia Ruskin University in the U.K., on the impacts beavers are having as they move into the Arctic tundra.

NPR's Sacha Pfeiffer speaks with Alex Mumford, who moved to the Isle of Rum in the Scottish Hebrides as a part of the island chain's efforts to boost its population.

A new report points to a decline in heart disease and stroke deaths, but cardiovascular disease remains the top cause of death in the U.S. Lifestyle changes could delay or prevent about 70% of cases.

Are sleep trackers on your phone helping you get a full night's rest? NPR's Life Kit investigates.