A single speck of dust is half way in size between a subatomic particle and the Earth.
15
For every gallon of sea water, you get more than a quarter pound of salt.
45
Pure water (H2O) does not conduct electricity on its own.
46
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Most dust particles in your house are made from dead skin!
67