A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Diamonds can be shattered with a hammer.
-104
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Scientists in Germany have developed a candy that doesn't cause cavities.
11
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Scientists aren't sure what color dinosaurs were.
312