NASA is asking for help to retrieve Mars samples that could be the first evidence of alien life

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perseverance rover gold sample tube with grey rock inside
A rock core is visible inside the Perseverance rover's sample tube.

NASA/JPL-Caltech/ASU

Scientists went on a hunt for the elusive colossal squid — and brought cruise ship tourists with them

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A man in a plaid shirt and vest looks at a large container holding a colossal squid
In 2014, a fishing vessel caught a colossal squid, which New Zealand researchers dissected.

Marty Melville/AFP via Getty Images

Scientists solved the 70-year-old mystery of an insect's invisibility coat that can manipulate light

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A side-by-side with a photo of a leafhopper on the left and black-and-white image of brochosomes on the right.
Leafhoppers (left) are a common backyard insect that secrete amazingly complex nanoparticles called brochosomes (right).

Lin Wang and Tak-Sing Wong

A 13-year-old girl helped unearth an ancient Roman town. She's finally getting credit for it over 90 years later.

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A girl in a plaid dress and braids excavated an Ancient Roman town in the 1930s
At 13, Helen Carlton-Smith took part in excavating Verulamium and kept a diary of the dig.

Photographs from the Verulamium Excavations of the 1930s ©St Albans Museums

Researchers used the world's most powerful MRI to get brain scans that are 10 times as detailed as a hospital MRI — take a look

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Two people sit at desk looking at a brain scan on a computer from a powerful MRI machine
The 11.7 Tesla Iseult is currently the most powerful MRI machine in the world.

Y. Audic/CEA

Hazardous 'forever chemicals' in water, food, and air won't disappear with new EPA rules. But 6 simple tactics can reduce your exposure at home.

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toddler child drinks bottled water
A child drinks bottled water in Reynosa, Mexico.

Daniel Becerril/Reuters

Hazardous 'forever chemicals' stay in your blood for years, longer than lead or arsenic. It still helps to cut them out.

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Empty bottles are stacked in a row. Cleaning of plastics in the production of pure water. Background from blue bottles with backlight. Environmental problem due to plastic in everyday life

Artem Sokolov/Getty

Your drinking water could contain fewer hazardous 'forever chemicals' under new federal rules

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water fountain
The EPA finalized the first-ever limits on PFAS, or "forever chemicals," in drinking water.

Getty Images

Hundreds of couples got married during the solar eclipse. Photos show mass weddings featuring moon-themed cakes and protective glasses.

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A bride and groom watch the solar eclipse
Lori Lycans and Tom Wissinger watch the eclipse at "Elope at the Eclipse" in Tiffin, Ohio, before getting married during totality.

Maddie McGarvey/For The Washington Post via Getty Images

I watched the total solar eclipse in a city that doubled in size during the event. I don't regret it.

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On the left, Burlington's Waterfront Park mostly empty. On the right, the same park is packed with people for the April 8 eclipse.
Burlington's Waterfront Park on a typical day (left) versus the day of the total solar eclipse (right).

Barry Winiker/Getty Images / Ellyn Lapointe

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