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 ...

Permanently fixes blown Head gaskets, cracked heads and porous engine block One bottle is enough to Fix gaskets in cars, SUVs and small trucks; large engines Require two bottles The ceramic micro ...