The possibility that global warming will trigger abrupt climate change is something people might not want to think about. But University of Arizona astronomer Roger Angel thinks about it.
Canadian scientists say a mouse-based study suggests too little folate in the diet might increase the risk of colon cancer.
Poisonings resulting from teenagers using common jimson weed as a hallucinogen have been reported in New Jersey, California, Colorado and other states.
The World Health Organization in Switzerland says inadequate attention to sexual and reproductive health has caused an increase in disabilities and death.
The International Space Station's Expedition 14 Cmdr. Michael Lopez-Alegria has started several days of robotics proficiency work.
The U.N. narcotics czar warns that Europe is headed toward a cocaine crisis as many governments there continue to be in denial of the problem.
Authorities are investigating the cause of the nuclear reactor shutdown at Three Mile Island near Harrisburg, Pa., although no radiation leaked in the incident.
A tiny worm may provide big answers for modeling the genetics of nicotine dependence, said researchers at the University of Michigan.
Doctors in China reportedly have completed what is thought to be the world's second face transplant.
Social pressures and perceptions that influence young people's sexual behavior are markedly similar around the world, London researchers said.