Indoor pollution is 10 times more toxic than outdoor pollution.
62
Cold water weighs more than hot water.
93
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
One barrel of petroleum holds 42 gallons.
20
A cubic yard of air weighs about 2 pounds at sea level.
31
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11