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"/

Organic molecules in Mars meteorites did not originate in alien microbes.

Also in the works: A computer than can tell when you are pissed at it.

The strange Medusae Fossae Formation may be 2 billion years older than previously thought.

Dramatic changes in pressure did not appear to harm hitchhiking mollusks.

A new petition asks to make taxpayer-funded research free to everyone to read. Startups and small businesses would benefit, they say.

NASA's Cassini probe is preparing to tilt its orbit around Saturn dramatically.

According to a study done by MIT, most people smile when frustrated. They have gone on to create a computer program to differentiate between happy smiles and frustrated smiles. This research is done in part to better understand autistic behavior.