The research lasted a decade and involved more than 100,000 women. >>

Where does evil come from? Look in the mirror, the author says. >>

German researchers have found a peptide in human blood that blocks HIV and have identified a synthetic variant that is 100 times more potent, they reported Friday in the journal Cell. >>

An infection that appears to reduce live births in pregnant lab mice has been found in a large share of human cases. >>

A second year of lower mortality suggests a link to stopping replacement therapy for menopause, some researchers say. >>

The fuel would create more ground-level ozone than gasoline if used heavily, a study finds. Critics disagree on the overall risk. >>

Some members object, saying the U.N. panel is overreaching its expertise and authority; others argue that global warming threatens peace. >>

The shot, the nation's first, is only modestly effective but could slow a possible pandemic. >>

Panel of retired military leaders says food shortages, new Arctic shipping routes and disasters could affect U.S. interests. >>

NASA says a bad computer command eventually led to a loss of power. >>

The hypertension medication prazosin appears to reduce nightmares and improve rest in those with post-traumatic stress disorder. >>

President vows a veto, but restrictions are likely to be short-lived in light of backing by most potential successors. >>