Pumice is the only rock that floats on water.
14
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
A cubic yard of air weighs about 2 pounds at sea level.
31
No matter how cold it gets, gasoline will not freeze.
107