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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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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

The Movius line separates regions of the world where Acheulean hand axes were made from regions wher The Movius line separates regions of the world where Acheulean hand axes were made from regions wher
Emanuel Leutze’s Washington Crossing the Delaware (1851) is riddled with historical inaccuracies, mo Emanuel Leutze’s Washington Crossing the Delaware (1851) is riddled with historical inaccuracies, mo
Deciduous and permanent teeth Deciduous and permanent teeth
Inspecting the teeth Inspecting the teeth
Teeth Teeth
What is the discounted value of deposits of $150.00 made at the end of each month for fourteen ... What is the discounted value of deposits of $150.00 made at the end of each month for fourteen ...
Video: Control of ventilation rate by other brain centers (posts, hypothalamus & cerebral cortex)

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