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South Dakota to Texas: Storms Produce Large Hail, Tornadoes
PHOTOS, VIDEOS: Dallas Area Tornado Outbreak
North Pole Moves as Ice Sheets Melt
Astronomers say radiation will disrupt cell phone, radio and GPS communications, and could potentially lead to "one heck of an aurora."
New research shows that males of a type of ground spider known as Micaria sociabilis also eat females, and scientists are trying to figure out what motivates this behavior.