Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Trichromatic Theory of Color Vision
How to solve word problems with two unknowns (Question 4)
