Research indicates that plants grow healthier when they are stroked.
173
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
One ragweed plant can release as many as one billion grains of pollen!
51
Pumice is the only rock that floats on water.
14
Sound travels fifteen times faster through steel than through air.
134
If the chemical sodium is dropped into water it will immediately and violently explode.
67
In zero gravity, a candle's flame is round and blue.
16
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61