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There are 60,000 miles of blood vessels in every adult human.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.