The Bent Pyramid in Egypt is one of the world’s most mysterious ancient mega-structures. Built by a pharaoh called Snefru, its angle changes half way up. Why does this pyramid have such a bizarre and unique shape? Now archaeologists and engineers investigate the true story of its construction. They crawl inside age-old tunnels to discover its engineering secrets. New discoveries beneath the desert sand reveal the ruins of a magnificent lost temple and an opulent palace fit for a king. Was this strange pyramid always intended to look like this? Or did something go catastrophically wrong?

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