#1. In parts of Japan, if a black cat crosses one’s path, it is considered a sign of good luck.
#2. When astronauts remain weightless in space for prolonged periods, scientists have discovered, their bones lose a measurable amount of weight and thickness. This means that weightlessness actually causes human beings to shrink.
#3. According to tests made at the Institute for the Study of Animal Problems in Washington, D.C., dogs and cats, like people, are either right-handed or left-handed–that is, these animals favor either their right or left paws.
#4. If the earth were the size of a quarter, the sun would be as large as a 9-foot ball and would be located a football field’s distance from the earth. If the entire solar system were the size of a quarter, the sun would be visible only under a microscope, and the nearest star would be 300 feet away. If our whole galaxy were the size of a quarter, our solar system would be less than the size of a molecule. Other galaxies would be from a foot to 1,000 feet away.
#5. The only manmade structure visible from space is the Great Wall of China.
#6. From ancient times until the nineteenth century in China, long fingernails were considered a mark of great beauty and, for members of the scholar-ruling class, a symbol of distinction indicating that they never worked with their hands. To protect their nails-which were sometimes more than 2 inches long-from cracking, both men and women attached special silver or gold covers to them. They wore these protective shields even when they slept.
More astonishing facts coming soon! 
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