Iron weighs more after it rusts.
68
Nylon is made from coal and petroleum.
42
Sound travels about 4 times faster in water than in air.
408
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
For every gallon of sea water, you get more than a quarter pound of salt.
45
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
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17