The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Pure water (H2O) does not conduct electricity on its own.
46
For every gallon of sea water, you get more than a quarter pound of salt.
45
A cubic yard of air weighs about 2 pounds at sea level.
31
Research indicates that plants grow healthier when they are stroked.
173
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39