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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The human body produces and destroys 15 million blood cells every second.