A cubic yard of air weighs about 2 pounds at sea level.
31
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Most dust particles in your house are made from dead skin!
67
4.5 pounds of sunlight strike the Earth each day.
27
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Scientists aren't sure what color dinosaurs were.
312