The normal aging process has long been linked to problems with cell respiration, the process through which the cells extract energy from nutrients. Researchers have now shown how certain proteins that are synthesized in the cellular mitochondria -- popularly known as the cells' power plants -- become unstable and disintegrate, which in turn can impair cell respiration and cause premature aging.img src="http://feeds.feedburner.com/~r/sciencedaily/~4/ez2T-Ja2Zs0" height="1" width="1"/

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.