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On average, the stomach produces 2 L of hydrochloric acid per day.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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