Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Iron weighs more after it rusts.
16
4.5 pounds of sunlight strike the Earth each day.
27
Iron weighs more after it rusts.
68
A cesium atom in an atomic clock beats over nine billion times a second.
43
Billions of neutrinos pass unnoticed through your body every second.
6
If the chemical sodium is dropped into water it will immediately and violently explode.
67
