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Difference between Dark matter and Gray matter

dark matter—objects not directly detectable by astronomers, thought to exist in the universe to account for observed gravitational effects: The composition of dark matter is unknown, but may include new elementary particles. gray matter— 1. brownish-gray nerve tissue, especially of the brain and spinal cord: The researchers found increased gray matter density in women in […]

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Difference between Dark age and Dark Ages

dark age—a period in which there is a lack of culture and progress in a society: Shortly before 1700 B.C. a dark age settled over Egypt which was to last some one hundred and fifty years. Dark Ages, the—the period of European history between about A.D. 500 and about A.D. 1000: During these, which are […]

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