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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
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The horizontal fraction bar was introduced by the Arabs.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.