During his lifetime, artist Vincent Van Gogh only sold one of his paintings.
A chameleon's tongue is twice the length of its body.
The Boeing 747 is capable of flying upside-down if it weren't for the fact that the wings would shear off when trying to roll it over.
A cesium atom in an atomic clock beats over nine billion times a second.
In the middle ages, people would pin the name of their sweetheart to their sleeve on Valentine's Day and keep it there for a week, hence 'wearing their heart on their sleeve'.
All the gold ever mined could be molded into a cube 60 feet high and 60 feet wide.
The smartest dogs are the Jack Russell Terrier and Scottish Border collie. Dumbest: Afgan hound.
Methane gas can often be seen bubbling up from the bottom of ponds. It is produced by the decomposition of dead plants and animals in the mud.
Humphrey Bogart NEVER said "Play it again, Sam" in Casablanca.
In Devon, Connecticut, it is unlawful to walk backwards after sunset.