Most dust particles in your house come from dead skin.
48
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
The average home creates more pollution than does the average car.
33
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
One cubic foot of gold weighs more than 1,200 pounds!
78