The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Pure water (H2O) does not conduct electricity on its own.
46
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Balsa wood is classified as a hard wood!
41
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
One cubic foot of gold weighs more than 1,200 pounds!
78