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requiem

(Encyclopedia) requiemrequiemrĕkˈwēəm, rēˈ–, rāˈ– [key] [Lat.,=rest], proper Mass for the souls of the dead, performed on All Souls' Day and at funerals. The reformation of Roman Catholic liturgy…

stethoscope

(Encyclopedia) stethoscopestethoscopestĕthˈəskōpˌ [key] [Gr.,=chest viewer], instrument that enables the physican to hear the sounds made by the heart, the lungs, and various other organs. The…

Alex's Time Travel Essay

Student imagines traveling to the battle of Lexington and Concord during the American Revolution   Related Links American…

Space

On clear nights, you can see the trail of the Milky Way's spiral arms. Earth is located in the Orion Spur.  As author Douglas Adams wisely observed, "Space is big. Really big."…

Lightning Facts & Fictions

What is Lightning? The action of rising and descending air within a thunderstorm separates positive and negative charges. Water and ice particles also…

The Age and Composition of the Universe

In one of the most important cosmological discoveries in years, NASA scientists have captured the most precise image of the universe, shedding light on its origins, age, and providing further…