Babies cry but they don't produce tears until one to three months after birth.
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A hard working adult sweats up to 4 gallons per day.
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Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
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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.
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Studies suggest that people who appear to be constantly distracted have more "working memory" and "sharper brains".
13
About 3000 years ago, most Egyptians died by the time they were 30!
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