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Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Local and long–distance cell communication in animals. Local and long–distance cell communication in animals.
A laser-guided observation of the Milky Way Galaxy at the Paranal Observatory in Chile in 2010. A laser-guided observation of the Milky Way Galaxy at the Paranal Observatory in Chile in 2010.
Get Fit, Stay Well! Brief Edition Plus Mastering Health Get Fit, Stay Well! Brief Edition Plus Mastering Health
Part of a Semantic Network in Long-Term Memory Part of a Semantic Network in Long-Term Memory
Long division for polynomials Long division for polynomials
A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di
Video: Carpal Tunnel Syndrome

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