The landslide on the slopes of Mount La Perouse in Alaska on February 16, 2014 is thought to be the largest known natural landslide on Earth since 2010.
A new study suggests that elephants make a specific rumble in response to the danger of humans that's distinct from calls warning of bees or other threats.
On March 5, NOAA reported that ice cover over North America's Great Lakes had reached 91 percent. The lakes have not been so covered with ice since 1973.