The ribs of a 240-million-year-old fossil hold clues to how the first turtle shell evolved. And its skull shape seems closer to that of lizards and snakes than to an ancestor of dinosaurs and birds.
Scientists are trying to predict what might happen if genetically modified salmon escaped growth facilities. It's a scenario often raised by critics who don't want the FDA to approve sale of the fish.
Breweries are grappling with more weather extremes — heat waves, snowy winters, heavy rains and drought. Many are coming up with creative ways to adjust to their changing environments.
Children as young as 3 years old will step in to right the wrong if they see someone being mistreated, a study finds. But they aren't as keen as 5-year-olds to dole out punishment.
The view captured by the Dawn spacecraft this month "shows even more small spots in the crater than were previously visible," NASA says.
Driven by new regulations and fracking, more coal power plants are retiring for cheaper, cleaner-burning natural gas. But scientists have yet to work out the fossil fuel's imperfect climate footprint.
For many Americans, an NPR poll suggests, walking is their most consistent exercise. But how much can a moderately paced walk really help your health?
NPR's Melissa Block interviews Environmental Protection Agency administrator Gina McCarthy on the second anniversary of the president's Climate Action Plan.
When Middle East respiratory syndrome erupted in South Korea, people started wearing masks everywhere, even at weddings. So how good are these masks at stopping MERS or even the flu?
The giant reptile was taken from Isabela Island in Ecuador's Galápagos archipelago as part of an early effort to sustain the species, which is native only to the remote Pacific island chain.
Treated sewage water accounts for half the water used by Israel's farms. Entrepreneurs are experimenting with ways to cut costs and to ensure that the 86 percent of wastewater that's recycled is safe.
The Fitnet app uses your phone's camera to analyze your workout and give feedback. Next step is a live trainer on the other end. The hitch: Your Internet speed likely needs to be 40 times faster.
The popularity of antlers as rustic décor is threatening deer and elk in the Pacific Northwest. The animals can naturally shed antlers, but some people harass or kill animals to get at prized racks.
The push for cleaner fuels in Oregon and Washington could bring the region more crude oil and a new refinery along the Columbia River. It would be the first refinery on the West Coast in 25 years.
The annual Man v. Horse Marathon in Wales sounds like a lopsided contest favoring racers with four feet. But scientists say that Homo sapiens evolved to be incredible endurance athletes, too.
The new rules, yet to be finalized, were expected to cut greenhouse gas emissions by a quarter by the year 2027.
Hormones from medical treatments wind up in wastewater, and that can be a problem. Some scientists think a version of a household chemical, hydrogen peroxide, could be part of the solution.
"We had crows literally come down and tap me on the head, trying to scare me," a man says of crows that aggressively swoop at humans.
Cosmologist Sean Carroll tackles a deceptively simple question: Why does time exist at all? The potential answers point to a surprising view of the nature of the universe, and our place in it.
Psychologist Laura Carstensen says that as people get older, they usually become less stressed and more content.