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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
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.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.