A cubic yard of air weighs about 2 pounds at sea level.
31
Hot water can freeze faster than cold water.
181
Most dust particles in your house come from dead skin.
48
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
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
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Scientists in Germany have developed a candy that doesn't cause cavities.
11