The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Pumice is the only rock that floats on water.
14
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Iron weighs more after it rusts.
16
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
One third of the electricity produced on earth is used to power electric light bulbs!
75