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There are 60,000 miles of blood vessels in every adult human.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Your heart beats over 36 million times a year.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.