The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Indoor pollution is 10 times more toxic than outdoor pollution.
62
For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels fifteen times faster through steel than through air.
134
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
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42