Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The sun is 330,330 times larger than the earth.
75
Sound at the right vibration can bore holes through a solid object.
134
One cubic foot of gold weighs more than 1,200 pounds!
78
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79