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Did you know?
Your heart beats over 36 million times a year.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.