Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
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 smell of freshly cut grass is actually a plant distress call.
31
Cold water weighs more than hot water.
93
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
The earth is approx. 6,588,000,000,000,000,000 tons.
175