It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
4.5 pounds of sunlight strike the Earth each day.
27
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
For every gallon of sea water, you get more than a quarter pound of salt.
45