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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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The horizontal fraction bar was introduced by the Arabs.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
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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.