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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.