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Author Question: A sizable minority of African Americans can trace their ancestry to Central Africa. Indicate ... (Read 43 times) |
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The longest a person has survived after a heart transplant is 24 years.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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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.
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There are more nerve cells in one human brain than there are stars in the Milky Way.