The earth is approx. 6,588,000,000,000,000,000 tons.
175
German chemists made a replica of a trophy the size of one molecule.
68
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
A ball of glass will bounce higher than a ball made of rubber.
73
A cubic yard of air weighs about 2 pounds at sea level.
31
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
In zero gravity, a candle's flame is round and blue.
16