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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

This diagram shows a cross-section of a solar-type star. This diagram shows a cross-section of a solar-type star.
Young adults usually grieve loss of a role, such as employment or the breakup of a relationship. Young adults usually grieve loss of a role, such as employment or the breakup of a relationship.
Listening to loud music with headphones or at rock concerts is a frequent cause of hearing loss amon Listening to loud music with headphones or at rock concerts is a frequent cause of hearing loss amon
Mass Loss from a Supermassive Star Mass Loss from a Supermassive Star
Carrie Mae Weems, A Negroid Type, from the series From Here I Saw What Happened and I Cried. Carrie Mae Weems, A Negroid Type, from the series From Here I Saw What Happened and I Cried.
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Video: Morphology of a tomato plant

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