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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

A guinea pig being held A guinea pig being held
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
In the heat of the Battle of Lake Erie, Perry had to abandon his flagship, the Lawrence, which had b In the heat of the Battle of Lake Erie, Perry had to abandon his flagship, the Lawrence, which had b
That politics was always a rough business is shown in this cartoon, which shows Lincoln, assisted by That politics was always a rough business is shown in this cartoon, which shows Lincoln, assisted by
The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap
skeletal muscle consists of a group of fibers held together by connective tissue. It is enclosed in ... skeletal muscle consists of a group of fibers held together by connective tissue. It is enclosed in ...
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