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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Types of uterine fibroids.
Types of Fold Strata
Types of Levers
A 44-g block of ice at -15°C is dropped into a calorimeter (of negligible heat c