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| Description: Possible Geometries of the Universe The shape of space (represented here as two-dimensional for ease of visualization) is determined by the matter and energy contained in the universe. The curvature is either (a) positive, (b) zero, or (c) negative, depending on whether the average matter and energy density throughout space is greater than, equal to, or less than a critical value. The lines on each curve are initially parallel. They converge, remain parallel, or diverge, depending on the curvature of space. Picture Stats: Views: 488 Filesize: 114.27kB Height: 900 Width: 557 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18798 |