Indoor pollution is 10 times more toxic than outdoor pollution.
62
In zero gravity, a candle's flame is round and blue.
16
Your brain is 80% water.
525
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 travels fifteen times faster through steel than through air.
134
A cubic yard of air weighs about 2 pounds at sea level.
31
Hot water can freeze faster than cold water.
181