Sound travels about 4 times faster in water than in air.
408
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
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 cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57