Most dust particles in your house are made from dead skin!
67
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Iron weighs more after it rusts.
16
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The bark of an older redwood tree is fireproof.
65
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Aluminum used to be more valuable than gold!
84