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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

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Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Dish from Ecuador called "Cuy" Dish from Ecuador called "Cuy"
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Temperature profile of the Uranian troposphere and lower stratosphere. Cloud and haze layers are als Temperature profile of the Uranian troposphere and lower stratosphere. Cloud and haze layers are als
Uranus's southern hemisphere in approximate natural colour (left) and in shorter wavelengths (r Uranus's southern hemisphere in approximate natural colour (left) and in shorter wavelengths (r
A Production Function with Diminishing Marginal Product of Capital A Production Function with Diminishing Marginal Product of Capital
Use the product rule to find derivative Use the product rule to find derivative
Video: Calvin cycle (The light-independent reactions )

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