According to the U.S. Lawn Tennis Association, a tennis ball is supposed to bounce between 53 and 58 inches when it is dropped on concrete from a height of 100 inches. The concrete surface should be 4 inches thick.
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The first commercial passenger airplane began flying in 1914. The first commercial passenger airplane with a bathroom began flying in 1919.
While diamonds are usually considered the most precious of stones, a large, near flawless emerald is worth considerably more than a diamond of the same size.
Lucy Hobbs Taylor was the first woman in the US to become a certified dentist in 1867.
Winking at women, even to express friendship, is considered bad manners in Australia.
A "duffer" is Australian slang for a cattle thief.
If you dream about some particular subject it is not often that the dream is about that. Dreams speak in a deeply symbolic language. The unconscious mind tries to compare your dream to something else, which is similar. Its...Read More