Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
One barrel of petroleum holds 42 gallons.
20
A ball of glass will bounce higher than a ball made of rubber.
73
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5