Iron weighs more after it rusts.
68
Balsa wood is classified as a hard wood!
41
Liquid TIDE laundry detergent glows under a blacklight.
96
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
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
A cesium atom in an atomic clock beats over nine billion times a second.
43