Sound travels fifteen times faster through steel than through air.
134
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
The average home creates more pollution than does the average car.
33
Sound at the right vibration can bore holes through a solid object.
134
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
In zero gravity, a candle's flame is round and blue.
16
4.5 pounds of sunlight strike the Earth each day.
27