Aluminum used to be more valuable than gold!
84
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
A cubic yard of air weighs about 2 pounds at sea level.
31
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
If the chemical sodium is dropped into water it will immediately and violently explode.
67