Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
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
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The force of a suction cup is calculated using F=AP.
15
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75