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Cyanide works by making the human body unable to use oxygen.

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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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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

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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.

Traniello and his colleagues demonstrated that social insects may develop “social imm Traniello and his colleagues demonstrated that social insects may develop “social imm
Play provides these preschoolers with the ability to interact with one another, and develop their ph Play provides these preschoolers with the ability to interact with one another, and develop their ph
A model of anxiety in which stressful events or a changing mental condition can produce unfavorable A model of anxiety in which stressful events or a changing mental condition can produce unfavorable
Major Events in the History of Psychology Major Events in the History of Psychology
Vienna: Social Structure and Social Interaction Vienna: Social Structure and Social Interaction
Indicators of Social Development Indicators of Social Development
Video: Cardiac Cycle (Part 4 of 4)

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