Pumice is the only rock that floats on water.
14
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
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
Out of all the senses, smell is most closely linked to memory.
146
Nearly 50% of the world's scientists are assigned to military projects.
71
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55