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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.