Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Iron weighs more after it rusts.
68
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Liquid TIDE laundry detergent glows under a blacklight.
96
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
For every gallon of sea water, you get more than a quarter pound of salt.
45
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89