In zero gravity, a candle's flame is round and blue.
16
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
The average home creates more pollution than does the average car.
33
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
One ragweed plant can release as many as one billion grains of pollen!
51
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Balsa wood is classified as a hard wood!
41