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NPR's Scott Simon speaks to Liz Dozier, former high school principal and CEO of Chicago Beyond, about relying less on School Resource Officers and more on counseling programs to improve security.

Scientists at the Oceans Alive project of the group Environmental Defense have updated their popular guide to the best and worst seafood choices. For the first time, the list indicates which fish are both high in omega-3 fatty acids -- the "good" fats -- and low in mercury contamination.

The Bering Sea may be ice-free in 50 years. If that happens, what happens to its walrus population? Alaska Public Radio's Annie Feidt reports that U.S. and Russian scientists are gathering data to help protect the marine mammals.

Public pools all over the country are facing lifeguard and staff shortages this summer. It's a problem that's been exacerbated by the pandemic. In Portland, Ore., pools are struggling to keep up.

The better the air quality in schools, the better students do academically and healthier they are. Improving air quality is expensive, so advocates hope money set aside under the Biden Plan will help.

The video game industry has a reputation for long hours and toxic environments. But now, a small studio is hoping to chart a different path as the first unionized video game company in North America.

The ultimate clean fuel, at least at first glance, is vegetable oil. Plants make it from sunlight, water, and a greenhouse gas — and they remove carbon dioxide from the air as they grow. The oil is easily converted into fuel for diesel engines. Around the globe there's now a rush toward so-called "biodiesel."

Economists are divided on whether buying a house is a good move in the current market. Host Guy Raz talks to economics blogger Barry Ritholtz, who thinks prospective buyers need to watch out. He says prices could drop another 10 to 15 percent.

Brain cells that track our location also can track time and distance, a study finds. This could explain how the brain uses place and time to organize memories throughout our lives.

This week's congressional hearings on social media, data mining and politics are shaping up as a watershed moment in the touchy relationships between Washington and Silicon Valley.