Regular tsunamis are destructive, but mega tsunamis are on another level. Could one really reach skyscraper heights? How are they formed, and what would happen if the biggest one ever hit? Scientists ...

Two wildfire experts argue that the L.A. destruction didn't have to be as bad as it was. The question isn't whether we can ...

Jaguars once roamed the American Southwest, but their presence faded over the years. Now, new sightings in Arizona suggest ...