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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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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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Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

The black-capped chickadee is a permanent resident in biomes with harsh winter conditions. The black-capped chickadee is a permanent resident in biomes with harsh winter conditions.
Permanent Teeth Permanent Teeth
A permanent epicardial pacemaker. The pulse generator can be placed in subcutaneous pockets in the s A permanent epicardial pacemaker. The pulse generator can be placed in subcutaneous pockets in the s
Burial caves from Mangaia, Cook Islands, document the changing patterns of mortuary ritual. Burial caves from Mangaia, Cook Islands, document the changing patterns of mortuary ritual.
Temporary and permanent pacemakers. Temporary and permanent pacemakers.
Is there anything in life that is permanent, or is the world constantly changing? Is there anything in life that is permanent, or is the world constantly changing?
Video: Michaelis–Menten equation & Kinetic parameters

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