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Author Question: During the ___________mammals replaced reptiles as the dominant form of land vertebrate. a. ... (Read 139 times) |
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There are 60,000 miles of blood vessels in every adult human.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.