Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
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
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
One cubic foot of gold weighs more than 1,200 pounds!
78