El Nino can raise sea levels along the U.S. West Coast, on top of warming-caused sea level rise.
There are some under-appreciated, San Andreas-like faults off Los Angeles that could unleash large quakes and tsunamis. But it's nothing like Hollywood's version.
El Nino will likely keep hurricane activity tamped down this season, which marks 10 years since Katrina.
Mount Everest and the surrounding peaks could lose nearly all their glaciers by 2100.
Plankton bloom in the eddies of the Gulf Stream in a new satellite image of the North Atlantic taken in May 2015.
After 35 years, the scars of the Mount St. Helens volcano eruption are still clearly evident in a satellite image.