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On average, the stomach produces 2 L of hydrochloric acid per day.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Diverticulosis. It is the presence of abnormal pouches in the wall of the large intestine (diverticu Diverticulosis. It is the presence of abnormal pouches in the wall of the large intestine (diverticu
Lung cancer. Photograph of part of a lung removed after death. The yellow area is a large tumor and Lung cancer. Photograph of part of a lung removed after death. The yellow area is a large tumor and
Seven black members of Congress in 1871 are from left to right: Senator Hiram Revels (R-MS) and Repr Seven black members of Congress in 1871 are from left to right: Senator Hiram Revels (R-MS) and Repr
Large families on U.S. farms used to be common. Children helped plant and harvest crops, take care ... Large families on U.S. farms used to be common. Children helped plant and harvest crops, take care ...
graphic(04-40.jpg) Mary pushes horizontally on a large, heavy table which is s graphic(04-40.jpg) Mary pushes horizontally on a large, heavy table which is s
The Scale of the Very Small and Very Large: Powers of 10 The Scale of the Very Small and Very Large: Powers of 10
Video: Otitis Media

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