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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

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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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