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A new computer model that analyzes summer-wind patterns can predict whether the United States will suffer a damaging hurricane season, according to the scientists who developed the tool.

Hurricanes are among nature's most destructive disasters. Eight of the 10 costliest U.S. calamities were hurricanes, says Mark A. Saunders, an atmospheric physicist at University College...

Scientists at Harvard University have nestled droplets inside droplets by squeezing three concentrically arranged streams of fluids into a glass tube. The double droplets could be useful for encapsulating food additives and components of cosmetics. The innermost (1) and outermost (3) fluids shown here are silicon oil, and the middle fluid (2) is a water-glycerol mixture. The two inner fluids...

People with the AIDS virus are many times more infectious to their sexual partners in the weeks or months just after they acquire the virus than they are later on, researchers in Uganda have determined. The study confirms the long-standing hypothesis that, compared with those infected for years, people recently infected with HIV contribute to the spread of the virus in excess proportion to...

Astronomers this week announced that they have discovered signs of an asteroid belt circling a sunlike star 41 light-years from Earth. If confirmed, the belt would be the closest known analog to the asteroid belt in the solar system and a possible indicator of rocky planets.

Charles Beichman of the California Institute of Technology in Pasadena and his colleagues base their...