The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Cold water weighs more than hot water.
93
The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
7
A ball of glass will bounce higher than a ball made of rubber.
73
Brass doorknobs automatically disinfect themselves in about 8 hours.
18