Nearly 50% of the world's scientists are assigned to military projects.
71
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 sun is 330,330 times larger than the earth.
75
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Pure water (H2O) does not conduct electricity on its own.
46
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
If the chemical sodium is dropped into water it will immediately and violently explode.
67