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The horizontal fraction bar was introduced by the Arabs.
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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.