In many countries, urine was used as a detergent for washing.
17
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
You share your birthday with at least 9 million other people in the world.
205
Most of the dust underneath your bed is actually your own dead skin.
251
One human hair can support 3 ounces.
191
30 years ago, you could buy a lifetime, unlimited first-class travel pass with American Airlines for $250,000.
14
