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Did you know?
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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There are 60,000 miles of blood vessels in every adult human.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Blood is approximately twice as thick as water because of the cells and other components found in it.