A ball of glass will bounce higher than a ball made of rubber.
73
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
In zero gravity, a candle's flame is round and blue.
16
A cubic yard of air weighs about 2 pounds at sea level.
31
The only letter not appearing on the Periodic Table is the letter "J".
180