Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
For every gallon of sea water, you get more than a quarter pound of salt.
45
Nearly 50% of the world's scientists are assigned to military projects.
71
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
Sound travels fifteen times faster through steel than through air.
134
Each day, up to 150 species of life become extinct.
-23
The smell of freshly cut grass is actually a plant distress call.
31