Cyanide works by making the human body unable to use oxygen.
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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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There are more sensory neurons in the tongue than in any other part of the body.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
Steller sea lions haul out on a rock off the coast of Raspberry Island (Alaska)
Mosaic image of the lunar south pole of the Moon
Island of Galesnjak
Population growth in India, China, Africa, and other countries in the developing world