Japanese Underwater Pyramids.... is it True??

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a structure thought to be world's oldest building, nearly twice the age of the great pyramids of egypt, has been discovered. the rectangular stone ziggurat under the sea off the coast of japan could be the first evidence of a previously unknown stone age civilization, say archeologist... the monument is 600ft wide and 90ft high and has been dated to at least 8000bc. the oldest pyramid in egypt, the step pyramid at saqqara, was constructed more than 5,000 years later.