Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One third of the electricity produced on earth is used to power electric light bulbs!
75
One cubic foot of gold weighs more than 1,200 pounds!
78
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
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