According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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The horizontal fraction bar was introduced by the Arabs.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
Evolutionary change in the tetrapod lineage, showing a transitional form.
Nephrolithiasis. Stones, or calculi, may form in several areas within the urinary tract. When they f
Blood Flow Through the Cardiorespiratory System
Endocrine and nervous control of blood pressure.
Shaking. A form of coarse vibration to a muscle or muscle group.