Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
A cubic yard of air weighs about 2 pounds at sea level.
31
Liquid TIDE laundry detergent glows under a blacklight.
96