Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Iron weighs more after it rusts.
16
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Pumice is the only rock that floats on water.
14
For every gallon of sea water, you get more than a quarter pound of salt.
45
The only letter not appearing on the Periodic Table is the letter "J".
180
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310