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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.