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A menstrual cup — this one is made of silicone rubber — is designed to collect menstrual blood. The bell-shaped device is folded and inserted into the vagina. The tip helps with removal.

Menstrual Cups: Study Finds They're Safe To Use — And People Like Them

A comprehensive analysis looks at the cup, its ability to prevent leaks — and whether it could be a viable alternative to pads and tampons in low-income countries.

Oil operations like this one on Alaska's North Slope are designed for freezing conditions. But as the permafrost thaws, companies are creating new products to help the industry cope.

Oil Industry Copes With Climate Impacts As Permafrost Thaws

Thawing permafrost in Alaska's Arctic is making it harder for oil companies to operate there. But a cottage industry has cropped up with new gadgets to help.

It's one thing to track your heart rate, pulse or other movements with a smart watch or other consumer electronics, researchers say, but quite another to rely on the device to diagnose a disease.

Like It Or Not, Personal Health Technology Is Getting Smarter

Tech evangelists say consumer electronics that sense, stream and interpret vital signs will lead to better health and lower costs. But skeptics say reliability and privacy issues still loom.

Do Carrots Really Help Your Vision?

The orange vegetable helps us see — but that's different from improving our vision. That said, carrots are part of a diet designed for eye health.

A roof bolter secures the roof of a newly mined section of a coal mine. Studies show roof bolters sometimes have high exposure to the silica dust that is especially toxic to lungs.

'Fundamental Shift' Needed To Protect Miners From Deadly Black Lung

Coal mines comply with new dust control regulations at a near perfect rate, but that may not lead to lower rates of the deadly disease black lung, according to a new report.

A tiny radio receiver built from components the size of two atoms. It emits a signal as red light, which is then converted into an electrical current and can be broadcast as sound by a speaker or headphone.

This Christmas Song Brought To You By The World's Tiniest Radio Receiver

Engineers made a radio receiver with building blocks the size of two atoms. One benefit of a radio so small you can barely see it: The machine works at extremely high temperatures.

Grim And Hopeful Global Trends To Watch In 2020 (And Fold Into A Zine)

There's cause for pessimism and optimism in the year ahead as our expert sources share their predictions. Plus: Print and fold your own global trends zine.

At the end of practice at the Xochikalli cultural center in Mexico City, ulama ballgame players perform a brief dedication to Aztec gods.

An Ancient Ballgame Makes A Comeback In Mexico

Ulama is a pre-Columbian team sport played with a solid rubber ball that's bounced off players' hips. In olden times, the game is said to have decided the winners of wars.

Felyssa Ricco stands outside the house in Hazleton, Pennsylvania, where she lives with her mother and stepfather, Kelly and Jesse Portanova. In addition to flying Old Glory and other flags, such as "Don't Tread on Me," the Portanovas sometimes fly the Confederate flag, saying it's a way of standing up to those who believe it shouldn't be displayed or who want to disregard America's history.

Michele Norris On The Anxiety Of White America, And Her Optimism For The Future

Former NPR host Michele Norris talks about her story for National Geographic magazine's issue on race. In it, Norris explores the unease of some residents of a rapidly changing Pennsylvania town.

This undated photo shows the San Diego Coronado Bay Bridge.

While Suicides Off Coronado Bridge Add Up, Lighting Project Raises Concerns It Could Get Worse

Prevention strategies remain elusive as lighting promises to boost bridge's profile. Last year, 18 people jumped to their deaths, the second-largest death toll ever.

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