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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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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

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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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All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Deep homology has been seen in lipid droplets Deep homology has been seen in lipid droplets
A radiator may be either a down-flow or a cross-flow type. A radiator may be either a down-flow or a cross-flow type.
A roller cell-type electric fuel pump. A roller cell-type electric fuel pump.
Comparison of Type 1 Diabetes to Type 2 Diabetes Comparison of Type 1 Diabetes to Type 2 Diabetes
High stress, by household type (age-standardized), age 18+, Canada, 1994-1995 High stress, by household type (age-standardized), age 18+, Canada, 1994-1995
Video: The Krebs Cycle Animation

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