The offspring of two sets of identical twins are legally cousins but genetically siblings.
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Men laugh longer, louder, and more often than women.
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About 2/3 of American men prefer boxers to briefs.
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Approximately 4 to 5% of the U.S. population has one or more clinically significant phobias in a given year. Specific phobias occur in people of all ages. The average age of onset for social phobia is between 15 and 20 years of age, although it can often begin in childhood.
30
The world's shortest man measures only 21.5 inches.
73
Babies crawl an average of 200m a day.
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Someone on Earth reports seeing a UFO every three minutes.
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