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In 1864, the first barbiturate (barbituric acid) was synthesized.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

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A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

SpaceShipOne completed the first manned private spaceflight in 2004, reaching an altitude of 100.124 SpaceShipOne completed the first manned private spaceflight in 2004, reaching an altitude of 100.124
Siblings report on what life events triggered changes in their relationships with each other, how ... Siblings report on what life events triggered changes in their relationships with each other, how ...
A diploma or certificate is proof of education completed. A diploma or certificate is proof of education completed.
A diploma or certificate is proof of education completed. A diploma or certificate is proof of education completed.
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The percentage of Canadian students in Grades 7 through 12 who used drugs The percentage of Canadian students in Grades 7 through 12 who used drugs
Video: Frequency of stimulation and force (Recruitment of motor units and force)

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