At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Your brain is 80% water.
525
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Hot water can freeze faster than cold water.
181
Each day, up to 150 species of life become extinct.
-23
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39