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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

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Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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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.

Occipital bone Occipital bone
Normal bone versus bone with osteoporosis. Normal bone versus bone with osteoporosis.
An “Intermediate-Mass” Black Hole An “Intermediate-Mass” Black Hole
Work and Gender: Women at Work in India Work and Gender: Women at Work in India
Structural MRIs reveal cortical loss in adolescent patients with schizophrenia. Here dark blue ... Structural MRIs reveal cortical loss in adolescent patients with schizophrenia. Here dark blue ...
Mass Wasting Triggers Mass Wasting Triggers
Video: Green alga life cycle Animation

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