People who got less than 42 minutes of bright daylight a day had a higher risk of dementia, and it predicted risk better than six well-known risk factors

Most adults spend their days indoors, where light levels are a small fraction of what they get outside, even on a cloudy afternoon. Researchers in China, Hong Kong and Sweden…

Oct 30, 2026 · 3 min read

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Neuroscience

Scientists estimated that about 3 in 4 former NFL players who died between 2008 and 2023 had CTE, after correcting for which families donate brains

Chronic traumatic encephalopathy, or CTE, is a brain disease linked to repeated hits to the head, and it can only be confirmed…

4 min read · JAMA Network Open

Medical Research & Innovations

For the first time, four major US medical groups say a woman’s period should be treated as a vital sign for her heart

Heart disease is the leading cause of death in women, killing more than 400,000 a year in the United States, yet only…

4 min read · Circulation

Medical Research & Innovations

A liquid painted on children’s cavities in seconds stopped decay in more than half of treated teeth without drilling, but it comes with one visible trade-off

Tooth decay is the most common chronic disease in American children, affecting more than four in ten. For very young kids, treating…

4 min read · JAMA Pediatrics

Medical Research & Innovations

Scientists estimated that about 1 in 5 colorectal cancers worldwide is linked to a common stomach germ that more than four in ten people carry

Helicobacter pylori is a stomach bacterium that more than four in ten people worldwide carry. It is a known cause of stomach ulcers and stomach cancer, and some studies have…

Oct 26 · 3 min read

People who got less than 42 minutes of bright daylight a day had a higher risk of dementia, and it predicted risk better than six well-known risk factors

Scientists estimated that about 3 in 4 former NFL players who died between 2008 and 2023 had CTE, after correcting for which families donate brains

For the first time, four major US medical groups say a woman’s period should be treated as a vital sign for her heart

A liquid painted on children’s cavities in seconds stopped decay in more than half of treated teeth without drilling, but it comes with one visible trade-off

Scientists estimated that about 1 in 5 colorectal cancers worldwide is linked to a common stomach germ that more than four in ten people carry

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Researchers posed as patients and called in-network mental health providers, and fewer than 1 in 4 calls that reached someone got an appointment

A study of 18 fossils from a South African cave found that Homo erectus, likely our direct ancestor, lived there 2 million years ago. At that site, it was outnumbered 10 to 1 by another human species.

Scientists found that night owls were 70% more likely than morning people to stop working early because of poor health, and their jobs did not explain it

Scientists found that a plastic chemical sold as the safer replacement for phthalates showed up in over half of pregnant women and was linked to smaller babies