Iron weighs more after it rusts.
16
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
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
Each day, up to 150 species of life become extinct.
-23
Out of all the senses, smell is most closely linked to memory.
146
A ball of glass will bounce higher than a ball made of rubber.
73