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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.