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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.