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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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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.

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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There are 20 feet of blood vessels in each square inch of human skin.

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

The tarsier is a haplorhine, and may represent an evolutionary bridge between lower and higher prima The tarsier is a haplorhine, and may represent an evolutionary bridge between lower and higher prima
Conscientiousness is negatively correlated with a number of health-related behaviors. The higher the ... Conscientiousness is negatively correlated with a number of health-related behaviors. The higher the ...
On average, students in Roman Catholic schools score higher on national tests than students in ... On average, students in Roman Catholic schools score higher on national tests than students in ...
Country of Birth of Authorized U.S. Immigrants Country of Birth of Authorized U.S. Immigrants
A typical camshaft-driven high-pressure pump used to increase fuel pressure to 2,000 PSI or higher. A typical camshaft-driven high-pressure pump used to increase fuel pressure to 2,000 PSI or higher.
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Video: Replication of DNA and Chromosomes/ How do cells replicate their DNA? (Animation) no Audio

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