Humans

Fresh grilled swordfish now tastes like rolled newspapers to Greg O'Brien, an unexpected effect of his Alzheimer's. And shopping without a grocery list is futile. But summer barbecues are still sweet.

A very rare genetic mutation causes some people to develop Alzheimer's in their 30s. It also makes these people the ideal candidates for tests of potential Alzheimer's drugs.

Researchers at the Alzheimer's Association International Conference say there's growing evidence that women are more likely than men of the same age to develop Alzheimer's disease.

Scientists assume a wave of people from what's now Siberia crossed into North America via Alaska, maybe 23,000 years ago. Genetics support that, but may also suggest another wave from Australasia.

By targeting the process that creates toxic clumps of protein in brain cells, scientists hope to help not just Alzheimer's patients, but perhaps also people with Lewy body dementia and Parkinson's.

A study finds that children who demonstrate more "pro-social" skills — those who share more and who are better listeners — are more likely to have jobs and stay out of trouble as young adults.

The annual Man v. Horse Marathon in Wales sounds like a lopsided contest favoring racers with four feet. But scientists say that Homo sapiens evolved to be incredible endurance athletes, too.

As least 55 hospitals across the rural U.S. have closed since 2010. But northern Missouri's Putnam County Memorial finds that adding high-quality specialty services lures patients and revenue.

Scientists say they can now download signals from your brain — and translate them back into a picture that you saw. The images aren't crystal clear, but you can make out what's going on.