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Prescribed burns, like this one in Humboldt County, Calif., reduce the underbrush without destroying trees. Lenya Quinn-Davidson hide caption

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Lenya Quinn-Davidson

Why The South Is Decades Ahead Of The West In Wildfire Prevention

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You Mite Want To Shower After This

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Immunity To COVID-19 Could Last Longer Than You'd Think

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As Schools Reopen, Child Psychiatrists Expect To See A Surge Of Kids Who Need Help

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A woman surveys damage Monday from Hurricane Ida in a neighborhood in Kenner, La. The storm was fueled by abnormally warm water in the Gulf of Mexico. Scott Olson/Getty Images hide caption

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Scott Olson/Getty Images

How Climate Change Is Fueling Hurricanes Like Ida

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People who love a good thrill are known in psychology as high sensation seekers. According to psychologist Ken Carter, high sensation seekers produce less cortisol than low sensation seekers in risky situations like white water kayaking. They also seem to produce more dopamine, which is that neurotransmitter that's associated with pleasure. Behrouz Mehri/AFP via Getty Images hide caption

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Behrouz Mehri/AFP via Getty Images

Why A Good Scare Is Sometimes The Right Call

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A new U.S. intelligence report could not conclude whether the SARS-CoV-2 virus escaped from a lab in Wuhan, China or spilled over from an infected animal. Without more information about the early days of the outbreak, a more definitive explanation is unlikely, the report found. Ng Han Guan/AP hide caption

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Ng Han Guan/AP

Space Travel Is Taking Off, But Companies Also Want To Sell Things From Outer Space

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People don face masks to help keep the coronavirus at bay in June in Ankara, Turkey. But what about earlier recommendations to stay 6 feet away from others and limit close contact to 15 minutes? Are these still effective against the contagious delta variant? Adem Altan/AFP via Getty Images hide caption

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Adem Altan/AFP via Getty Images

Dew drops collected on blades of grass in Bangkok, Thailand. Anatthaphon Buangam/Getty Images/EyeEm hide caption

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Hillary Creech, of Jonesboro, Ark., built a DIY air purifier for her husband's classroom. "My husband's classroom in particular has a wall full of windows, none of which open," she said Courtesy of Hillary Creech hide caption

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Courtesy of Hillary Creech

Does Your Kid's Classroom Need An Air Purifier? Here's How You Can Make One Yourself

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Joelle Avelino