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

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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).

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Common arachnids. Common arachnids.
The b sheet, another common secondary structure in proteins The b sheet, another common secondary structure in proteins
Normal Faults Common at divergent plate boundaries Normal Faults Common at divergent plate boundaries
Common Physical and Mental Health Problems of Different Cultural Groups Common Physical and Mental Health Problems of Different Cultural Groups
Common Methods of Contraception Common Methods of Contraception
STDs in the United Stated STDs in the United Stated
Video: Stretch reflex & Tendon reflex

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