HARALD RITSCH / SCIENCE PHOTO LIBRARY HARALD RITSCH / SCIENCE PHOTO LIBRARY
Universe creation by brane collision. Illustration of a hypothesis based on M-theory, an extension of string theory that postulates that Big Bang creation of a universe can occur by the collision of two branes. The branes, sheet-like surfaces, are shown colliding and separating, with a new universe created at the point of their collusion (yellow, lower centre).
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