The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Cyanide works by making the human body unable to use oxygen.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
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There are more sensory neurons in the tongue than in any other part of the body.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
Detail of the Chinese-style gate of Nishi Hongan-ji in Kyoto; Momoyama period; National Treasure
Synodic Period
Embryonic Period
Fetal Period
Embryonic Period
How wide must a narrow slit be if the first diffraction minimum occurs at 12 with laser light ...