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Planetary ScienceMartian Radiation: Giving off a faint X-ray glow
Astronomers have for the first time taken an X-ray image of the Red Planet.
By Ron Cowen -
Health & MedicinePredisposed to Trouble: Gene variants implicated in stomach cancer
A person's risk of stomach cancer can depend on the genetics of both the individual and the bacterium Helicobacter pylori.
By Nathan Seppa -
EcosystemsWorm Attacks: Invading earthworms threaten rare U.S. fern
An unusual study of the effects of invading earthworms on North American plants finds that the exotics might be on the way to killing off a rare fern.
By Susan Milius -
Lost That Smoking Feeling: Emotions sputter as cigarette motivator
The first detailed effort to monitor the reactions of cigarette smokers as they carry out their daily activities finds that they feel neither better nor worse than at times when they don't begin smoking.