Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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 most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One cubic foot of gold weighs more than 1,200 pounds!
78
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Diamonds can be shattered with a hammer.
-104
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
The only letter not appearing on the Periodic Table is the letter "J".
180