Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
No matter how cold it gets, gasoline will not freeze.
107
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
One 75-watt bulb gives more light than three 25-watt bulbs.
57
4.5 pounds of sunlight strike the Earth each day.
27
Sound travels about 4 times faster in water than in air.
408