Aluminum used to be more valuable than gold!
84
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Most dust particles in your house are made from dead skin!
67
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
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
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