'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
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Mentally doing a task makes you better at it. Your mind can barely tell the difference.
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In the U.S., more than 10% of lottery prizes go unclaimed!
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There are 53 Lego bricks manufactured for each person in the world.
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If you chew gum when you study a subject and then chew the same flavor when you take the test, it will help you remember!
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According to an assistant professor of psychology and marketing at NYU, wearing red increases your chances in things like dating and hitchhiking.
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