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On average, the stomach produces 2 L of hydrochloric acid per day.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Cyanide works by making the human body unable to use oxygen.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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