Dirty snow melts faster than clean.
350
The Earth sees about 760 thunderstorms every hour, scientists have calculated.
185
The winter of 1912 was so cold that Niagara Falls froze over.
35
Moist air holds heat better than dry air.
114
The speed of a typical raindrop is 17 miles per hour.
181
Contrary to popular belief, lightning travels from the ground upwards not from the sky downwards.
101