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Universe as a Hologram

In 1997, the theoretical physicist Juan Maldacena proposed a bold model of the universe in which gravity, thin infinitesimal vibrating strings could be reinterpreted in terms of well-established physic’s. The mathematically complex world of chains, which exist in nine spatial dimensions plus one time, could just be a hologram: the real action unfold over a simpler, flatter cosmos where there is no gravity.