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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The horizontal fraction bar was introduced by the Arabs.
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There are more bacteria in your mouth than there are people in the world.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
An electrocardiogram (EKG) wave, a record of the electrical signal as it moves through the conductio
Internal view of the heart with aorta, vena cava, and pulmonary arteries and veins.
Heart of Mine by Peter Salett
Describe the development of atherosclerosis, including its role in the risk of heart disease