The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
In zero gravity, a candle's flame is round and blue.
16
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
The average temperature at 40,000 feet above sea level is -60 F.
56
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
The only letter not appearing on the Periodic Table is the letter "J".
180
Sound travels fifteen times faster through steel than through air.
134