Dirty snow melts faster than clean.
350
-40 degrees Celsius is equal to -40 degrees Fahrenheit.
96
Moist air holds heat better than dry air.
114
The Earth sees about 760 thunderstorms every hour, scientists have calculated.
185
It snows more in the Grand Canyon than it does in Minneapolis, Minnesota.
113
Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
106