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The horizontal fraction bar was introduced by the Arabs.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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There are approximately 3 million unintended pregnancies in the United States each year.

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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.

Myopia (nearsightedness). In the uncorrected top figure, the image comes into focus in front of the Myopia (nearsightedness). In the uncorrected top figure, the image comes into focus in front of the
Psoriasis. This photograph demonstrates the characteristic white skin patches of this condition. Psoriasis. This photograph demonstrates the characteristic white skin patches of this condition.
Erythroblastosis fetalis. (a) The condition occurs with an RH+ father and RH– mother. (b) First preg Erythroblastosis fetalis. (a) The condition occurs with an RH+ father and RH– mother. (b) First preg
Placenta previa. The condition is caused by the development of the placenta over the cervical canal, Placenta previa. The condition is caused by the development of the placenta over the cervical canal,
Cholelithiasis. Common sites of gallstones in the generalized condition. (a) Stones in the hepatic d Cholelithiasis. Common sites of gallstones in the generalized condition. (a) Stones in the hepatic d
Macro-, Meso-, Micro-Levels of Society Macro-, Meso-, Micro-Levels of Society
Video: Protein Secondary and Tertiary Structures - Animation

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