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#Mon Aug 09 12:12:16 CEST 2010
BranchingPoint__iaEWAKOeEd-WfYQ0GneCwQ_subTitle=For a long time, Euclidean geometry with its proofs was regarded as an unquestionable example of absolute knowledge. Doubts about its universal validity first emerge in the nineteenth century with Gauss\u2019 theory of curved surfaces and the spectacular construction of non-Euclidean geometries.
BranchingPoint__iaEWAKOeEd-WfYQ0GneCwQ_footer=Illustration\: Laurent Taudin
BranchingPoint__iaEWAKOeEd-WfYQ0GneCwQ_title=Curved Spaces