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The air this summer has been brutally hot. And, depending on where you live, also filled with wildfire smoke. Which means it's crucial to make sure the air inside is clean and safe to breathe.

Scientists are developing artificial wombs to rescue babies who would die or end up severely disabled because they are born very prematurely. The research is generating excitement, but also concerns.

NPR's Steve Inskeep speaks with security expert Juliette Kayyem of Harvard's Kennedy School about domestic security in a time of war.

People spend a lot of time outside during hot and humid weather. Whether you're going to the beach or working your shift as a lifeguard, try these 7 proven ways to stay cool while outside.

At Dharma Camp is in the foothills of Oregon's Cascade Mountains, campers make friendship bracelets, play games and try to keep their fidgety bodies still enough to meditate. For some teens, summers camps can be an important time to explore their religious beliefs outside of home.

Across the Midwest this summer, scientists are wading into 100 streams to collect water samples and check cages for fish eggs. It's part of a large study to understand how pesticides and agricultural chemicals from farms are affecting the nation's streams.

Guinea pigs are popular pets in the U.S., but in parts of South America, they're a delicacy. Some environmental and humanitarian groups are making a real push to encourage guinea pig farming as an eco-friendly alternative to beef. And the animals are also showing up in more U.S. restaurants.

By October, the state will have the most ambitious commercial food waste ban in the U.S. Institutions that produce more than a ton of waste a week will have to find new uses for their scraps.

Stanford University's decision to stop direct investments in coal mining companies is encouraging student-led divestment movements at other universities. Chloe Maxmin of Divest Harvard discusses her hopes following Stanford's announcement. Harvard University has the largest university endowment in the U.S.

If you really want to fight food waste, eat fish heads, the U.N. says. They're nutritious and delicious, but most fish heads get thrown back in the sea as trash or turned into livestock feed.