Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Balsa wood is classified as a hard wood!
41
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57