Scientists have found a star system that shows signatures of a water-rich past. It could be the first time scientists have linked water outside the solar system to a rocky (potentially inhabitable) body.
Tropical storm Karen, swirling toward the Gulf Coast, is slated to come ashore early Sunday as it crosses the Mississippi River Delta. A later, second landfall could come near Pensacola, Fla., forecasters say.
Landfall for tropical storm Karen is projected for early Sunday morning just east of Mobile, Ala. But forecast uncertainties mean it could come ashore anywhere from the New Orleans area to Indian Pass, Fla.
In the big bang's microwave afterglow is an odd light polarization pattern from when the universe was one millionth of a trillion trillionths of a second old. Scientists hope it illuminates a faster-than-light expansion.
Global warming weakens a key ingredient for tornado-making thunderstorms, prior studies held. True, researchers now say, but the number of days in the US where the right conditions exist will increase.
Parts of the Arctic Ocean containing at least 15 percent sea ice have increased by 78 percent when compared with the extent last year at this time, according to data compiled by the National Snow and Ice Data Center.