Earth may lie in the path of a lethal gamma-ray burst that could wipe out a quarter of our atmospheric ozone.
Born from thunderstorms, tornadoes can rip apart homes and toss cars around like toys. These are some of the most vicious twisters to hit the U.S. in recorded history.
Inconceivable” tornadoes, rated F6, have wind speeds of 319 miles per hour and can hurl cars and refrigerators like missiles.
Scientists monitoring Alaska's volcanoes have been forced to limit real-time tracking of eruptions amid ongoing federal budget cuts -- moves that could mean delays in getting vital information...
Yellowstone's underground volcanic plumbing is bigger and better connected than scientists thought, researchers said Wednesday.
If man-made, it is the most powerful quake to be blamed on deep injections of wastewater, according to a study published Tuesday by the journal Geology.
Massive volcanic eruptions may have led to the extermination of half of Earth's species some 200 million years ago, a new study suggests.
The threat of global warming may stretch so far beyond Earth that it affects meteorites millions of miles away in space -- at least according to one CNN anchor.