One third of the electricity produced on earth is used to power electric light bulbs!
75
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71