Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The average temperature at 40,000 feet above sea level is -60 F.
56
Sound travels fifteen times faster through steel than through air.
134
One ragweed plant can release as many as one billion grains of pollen!
51
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
German chemists made a replica of a trophy the size of one molecule.
68