An invader shrimp, hopping a ride on an overseas freighter, has entered the Great Lakes, fulfilling an 8-year-old prediction by Canadian researchers.
Analysis of the eggs of wild birds in California's San Joaquin Valley appears to show that recycling agricultural runoff is causing high levels of selenium.
Australian scientists have identified a brain system that could not only blunt an alcoholic's craving for booze, but also the addiction.
Medicare's extension of coverage for colonoscopies led to a significant increase in the number of cancers caught early, a U.S. study finds.
Pioneering U.S. heart surgeon Michael DeBakey is slowly getting back to work at age 98 after undergoing a surgery he himself developed.
U.S. teachers say they cannot show the environmental movie "An Inconvenient Truth" to their students because of a policy against endorsing projects.
Chinese scholars have found a series of ancient wells they believe provided water for Genghis Khan's legendary hordes during their campaign in Western Xia.
A blood test may replace invasive biopsies that heart transplant patients in the United States and elsewhere undergo to check for rejection, heart experts say.
Thanks mainly to Bush administration policy, the United States could soon find itself re-embracing the use of nuclear power.
A group of Chinese scientists is attempting to identify a 2,800-year-old mummy of an apparently Caucasian man found in an ancient tomb.