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
Sound at the right vibration can bore holes through a solid object.
134
Pumice is the only rock that floats on water.
14
Iron weighs more after it rusts.
68
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The sun is 330,330 times larger than the earth.
75