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Japan's pre-ice age underwater pyramid makes scientists question whether it was "really humans" who built it as mysteries unfold

A huge underwater structure that looks like a pyramid has been found near Japan, and it’s sparking curiosity and debate around the world. The strange monument lies about 82 feet below the sea, off the ...
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Japan’s 10,000-Year-Old Underwater ‘Pyramid’ Is Still One of the World’s Biggest Unsolved Mysteries—No One Knows Who Built It

Off the coast of Yonaguni Island in Japan, a submerged structure has puzzled divers, researchers, and archaeologists since its discovery nearly four decades ago. The monument, hidden beneath the ...