Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A cesium atom in an atomic clock beats over nine billion times a second.
43
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
One third of the electricity produced on earth is used to power electric light bulbs!
75