A cubic yard of air weighs about 2 pounds at sea level.
31
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Pure water (H2O) does not conduct electricity on its own.
46
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Sound travels about 4 times faster in water than in air.
408
Hot water can freeze faster than cold water.
181