Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Research indicates that plants grow healthier when they are stroked.
173
A cubic yard of air weighs about 2 pounds at sea level.
31
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Iron weighs more after it rusts.
16
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