This is 1.5 million geotagged tweets posted between March 9th and April 12th, 2010, mapped according to frequency of profanity. Mountains are the sweariest, valleys the cleanest. Seems the more people live in a place, the more people swear there.

(Click to enlarge.)

This proves that humans love swearing.

[Map by Daniel Huffman; via Brainpicker]