The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
442
Circumhorizontal arcs (loosely known as fire rainbows) are the rarest of all naturally occurring atmospheric phenomena.
21
-40 degrees Celsius is equal to -40 degrees Fahrenheit.
96
Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
106
Dirty snow melts faster than clean.
350
Moist air holds heat better than dry air.
114