The horizontal fraction bar was introduced by the Arabs.
Did you know?
Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
The mollusc body plan.
Thorax Posterior view of human body
Body Planes
Body mass index table.
Homeostasis and negative feedback as related to control of body temperature.
