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
Cold water weighs more than hot water.
93
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
In zero gravity, a candle's flame is round and blue.
16
The sun is 330,330 times larger than the earth.
75