Sound travels about 4 times faster in water than in air.
408
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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
German chemists made a replica of a trophy the size of one molecule.
68
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21