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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.