The horizontal fraction bar was introduced by the Arabs.
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Everyone has one nostril that is larger than the other.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
John Marin, Untitled (The Blue Sea).
William Morris, Page from a specimen book with sample proof letters, Kelmscott Press.
The development of the internal ducts of the male and female reproductive systems from the Wolffian ...