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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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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.

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
Five Times August - This Too Shall Pass Five Times August - This Too Shall Pass
First-pass effect. First-pass effect.
A typical distributor-type diesel injection pump showing the pump, lines, and fuel filter. A typical distributor-type diesel injection pump showing the pump, lines, and fuel filter.
Effleurage to iliotibial band with palm. Apply with heel of the hand from superior attachment to ... Effleurage to iliotibial band with palm. Apply with heel of the hand from superior attachment to ...
How to common factor an expression How to common factor an expression
Video: Phases of the ovarian cycle

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