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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Cyanide works by making the human body unable to use oxygen.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.