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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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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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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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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

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Everyone has one nostril that is larger than the other.

Peptic ulcer. A peptic ulcer may occur in the stomach (gastric ulcer), as shown here, or in the duod Peptic ulcer. A peptic ulcer may occur in the stomach (gastric ulcer), as shown here, or in the duod
Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T
Dermatological changes with myxedema can occur behind the eyes or in the lower leg, as shown here. Dermatological changes with myxedema can occur behind the eyes or in the lower leg, as shown here.
Pus-forming infection. Such infections occur more frequently in individuals with immunoglobulin ... Pus-forming infection. Such infections occur more frequently in individuals with immunoglobulin ...
Summary view of the light reactions as they occur in the thylakoid Summary view of the light reactions as they occur in the thylakoid
Diverticula Diverticula are small pouches that can occur along your colon Diverticula Diverticula are small pouches that can occur along your colon
Video: Genetic terms Animation

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