Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
In zero gravity, a candle's flame is round and blue.
16
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The smell of freshly cut grass is actually a plant distress call.
31
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89