Balsa wood is classified as a hard wood!
41
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
For every gallon of sea water, you get more than a quarter pound of salt.
45
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Out of all the senses, smell is most closely linked to memory.
146
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
Hot water can freeze faster than cold water.
181