The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are more bacteria in your mouth than there are people in the world.
True-color image of layers of haze in Titan's atmosphere.
How to set up and solve linear models (Question 1)