When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Each day, up to 150 species of life become extinct.
-23
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
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75