One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Iron weighs more after it rusts.
16
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
Scientists aren't sure what color dinosaurs were.
312
In zero gravity, a candle's flame is round and blue.
16
Sound travels about 4 times faster in water than in air.
408
Nylon is made from coal and petroleum.
42