One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Most dust particles in your house come from dead skin.
48
Sound travels fifteen times faster through steel than through air.
134
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
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
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