If the chemical sodium is dropped into water it will immediately and violently explode.
67
Iron weighs more after it rusts.
68
4.5 pounds of sunlight strike the Earth each day.
27
Scientists in Germany have developed a candy that doesn't cause cavities.
11
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
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9