Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Out of all the senses, smell is most closely linked to memory.
146
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310