Cold water weighs more than hot water.
93
For every gallon of sea water, you get more than a quarter pound of salt.
45
Iron weighs more after it rusts.
68
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average home creates more pollution than does the average car.
33
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Brass doorknobs automatically disinfect themselves in about 8 hours.
18