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Award-winning science journalist Alison Richards is deputy supervising senior editor for NPR's science desk.

The CDC says you can end isolation after five days. But emerging research shows with omicron, many people could be infectious for several days past that. So how do you determine if you're good to go?

What weighs about 20,000 pounds, is 17-feet high and 60-feet around? Answer: The pile of leaves that three guys in Utah assembled. Then, they did what comes naturally. They jumped into it.

Twice in recent decades more accurate measurements have led experts to say North America's tallest peak is shorter than they thought. It's still No. 1 on the continent, though.

Motion pictures went to the moon long before Apollo 11 did, and they keep going back. Critic Bob Mondello reflects on the many films, from 1902 to today, that have made the journey.

They're so noisy that the Central Pollution Control Board is urging drivers not to honk needlessly — like that Uber driver who beeps along with the song on the radio.

You can go to almost any cubic foot of ocean, stream, coral, backyard, ice shelves even, and if you look, you'll find scores of little animals and plants busy making a living. But here's a place — a beautiful, bountiful place — that when you look close — is a desert.

Oceans are rising as the climate changes, threatening coastal cities. A new study shows that much more of the world's population is vulnerable than earlier predictions had estimated.

With that pitch, coder boot camps are poised to get much, much bigger. Is this a new education delivery system?

Arizona's Supreme Court says an abortion ban passed during the Civil War should be the law of the land today. The EPA is putting limits on PFAS in drinking water.