Studies of the horns, spikes, plates and clubs of dinosaurs could help settle a long-standing debate over their function ...

Violent tornadoes ripped through parts of the U.S., wiping out schools and toppling semitractor-trailers in several states.

Winds gusting up to 80 mph were predicted from the Canadian border to Texas, threatening blizzard conditions in colder ...

Violent tornadoes ripped through parts of the U.S., wiping out schools and toppling semitractor-trailers in several states, ...

The threat of violent tornadoes in parts of the U.S. proved deadly as well as destructive as whipping winds moved east into ...

The threat of tornadoes in parts of the U.S. proved deadly as whipping winds moved east into the Mississippi Valley and Deep ...

Scientists said the storm's strength and potential for far-reaching impacts is notable, but its timing isn't unusual.

Winds gusting up to 80 mph were predicted from the Canadian border to Texas, threatening blizzard conditions in colder ...