Tesseract is a four space dimensions start from point a one dimension with no direction And if we move forward we get a line (one dimension) and further from the point if we move in a perpendicular direction we a square (two dimension) further in perpendicular we get a (3 dimension ) cube The cube has 6 faces they are square if we extend this square face from 2d- 3d we can get a tesseract. Interstellar tesseract representation The above image shows the representation of tesseract in the movie interstellar This tesseract has the capable of access space time.
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