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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There are 20 feet of blood vessels in each square inch of human skin.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
Blood supply to the pituitary gland
Animal Cell Diagram
This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f
Species-area curves
The growing demand for electrical power, carbon sequestration and storage must be a priority
Economic recession in 2008 saw a small decrease in demand