Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Did you know?
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
American Pit Bull Terrier
Painting of a Colonial American boy holding a pet squirrel.
A hearing-impaired patient using an interpreter.
Dolphin’s ability to understand an artificial language
Animals and Language (2 of 2)
Three polar bears investigate an American submarine that surfaced in ice-covered Arctic waters.