The speed of a typical raindrop is 17 miles per hour.
181
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
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
-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