In many countries, urine was used as a detergent for washing.
17
A Swiss man replaced his car's broken heater with a fully functional wood burning stove.
15
The scent of women’s tears temporarily reduces sexual arousal and testosterone production in men.
12
A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
20
You share your birthday with at least 9 million other people in the world.
205
The world’s smallest book, “Teeny Ted from Turnip Town”, is 100×70 micrometers in size and requires a scanning electron microscope to read, as light beams are too large.
6