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Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.