Iron weighs more after it rusts.
16
Your brain is 80% water.
525
Sound at the right vibration can bore holes through a solid object.
134
According to studies, men change their minds two to three times more often than women.
72
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
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
Sound travels fifteen times faster through steel than through air.
134