One barrel of petroleum holds 42 gallons.
20
Pure water (H2O) does not conduct electricity on its own.
46
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Hot water can freeze faster than cold water.
181