A new estimate lowers the amount of heat necessary, and thus the time needed, to melt the Greenland ice sheet
Longstanding records are being broken as a major March heat wave grips much of the country.
According to scientists, Death Valley's Ubehebe Crater may be ripe for another explosion.
A few hippos surface from a pond in the Maasai Mara national reserve in Kenya, an area heavily affected by prolonged drought.
An historic March heat wave continues across much of the country, as cool and wet conditions prevail across the West.
The country is divided between rare March warmth in the East, and cool and stormy conditions in the West.
A rare weather pattern for March is allowing May-like temperatures in the East, while the West gets pounded by storms.
A record warm week is ahead for much of the U.S. as highs reach the 70s all the way to the Upper Midwest and New England.