Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
A ball of glass will bounce higher than a ball made of rubber.
73
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A cesium atom in an atomic clock beats over nine billion times a second.
43