The face of a penny can hold about thirty drops of water.
85
A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
20
If left alone, 70% of birthmarks gradually fade away.
193
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
In a year approximately 900 million trees are cut down to make the raw materials needed for American pulp mills and paper.
-16
Mentally doing a task makes you better at it. Your mind can barely tell the difference.
18
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
24
A fire in Australia has been burning for more than 5,000 years!
91