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Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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The horizontal fraction bar was introduced by the Arabs.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

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Neural Circuits and Maternal Behavior Neural Circuits and Maternal Behavior
Bronfenbrenner’s model of the ecological-systems approach to studying development. He suggested that Bronfenbrenner’s model of the ecological-systems approach to studying development. He suggested that
The world attempted to deal with Somalia as if it were a real country but painfully learned that Som The world attempted to deal with Somalia as if it were a real country but painfully learned that Som
Although most gestures are learned, and therefore vary from culture to culture, some gestures that ... Although most gestures are learned, and therefore vary from culture to culture, some gestures that ...
Sociologists study the social factors that underlie human behavior, the experiences that mold us, ... Sociologists study the social factors that underlie human behavior, the experiences that mold us, ...
Video: Hormones and the menstrual cycle Animation

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