Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A cubic yard of air weighs about 2 pounds at sea level.
31
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The sun is 330,330 times larger than the earth.
75
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Pumice is the only rock that floats on water.
14
One barrel of petroleum holds 42 gallons.
20