One 75-watt bulb gives more light than three 25-watt bulbs.
57
Pumice is the only rock that floats on water.
14
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
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
No matter how cold it gets, gasoline will not freeze.
107
Out of all the senses, smell is most closely linked to memory.
146
Iron weighs more after it rusts.
16