In many countries, urine was used as a detergent for washing.
17
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
There are more than 10 million bricks in the Empire State Building!
75
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
Diamonds mined in Brazil are harder than those found in Africa.
40
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
Each day, there are over 120 million sexual intercourse taking place all over the world.
301