A new study found that apathy and depression significantly predict an individual's progression from mild cognitive impairment (MCI), a disorder of the brain that affects nerve cells involved in thinking abilities, to dementia, including Alzheimer's disease and Lewy body dementia.

One of the big mysteries in biology is why cells age. Now scientists report that they have discovered a weakness in a component of brain cells that may explain how the aging process occurs in the brain.

Newly divorced middle aged women are more vulnerable to contract HIV and other sexually transmitted diseases, according to new research, because they tend to let their guard down with new sexual partners and avoid using protection since they are not afraid of getting pregnant.

They're tantalizingly close, but other groups may beat them.

Schoolgirls in New York have developed a mysterious tic that seems contagious.

The latest Google Ocean update is the most accurate view of the sea floor yet.

A new study based on data collected over the last 100 years shows that many of the species unique to the Andes-Amazon basin of Peru and Bolivia lack vital national-level protection.

Analysis of two large, mysterious objects spotted on the sea floor.