If the chemical sodium is dropped into water it will immediately and violently explode.
67
The smell of freshly cut grass is actually a plant distress call.
31
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Research indicates that plants grow healthier when they are stroked.
173