Circumhorizontal arcs (loosely known as fire rainbows) are the rarest of all naturally occurring atmospheric phenomena.
21
Contrary to popular belief, lightning travels from the ground upwards not from the sky downwards.
101
Dirty snow melts faster than clean.
350
Carbon dioxide is a trace gas and by itself will produce little warming. Also, as CO2 increases, the incremental warming is less, as the effect is logarithmic so the more CO2, the less warming it produces.
11
-40 degrees Celsius is equal to -40 degrees Fahrenheit.
96
In ten minutes, a hurricane releases more energy than all the world's nuclear weapons combined!
371
Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
106