Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with supermassive black holes, surrounded by ... X-Ray Flashes from a Nearby Supermassive Black Hole ...

Recently a 2492 carat diamond weighing over a pound was found in Botswana in southern Africa. Diamonds are formed by carbon particles, black coal, being put under extreme pressures for long periods of ...

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