Over centuries, humans have tried to discover a Theory of Everything. Possible candidates for this cachet, such as String Theory and Grand Unified Theory, require higher dimensions or higher-dimensional symmetries, for instance ten dimensions, despite their radical difference from the world we actually experience. One such symmetry – known as E8 – exists in eight dimensions and is the largest symmetry without counterparts in every dimension and is therefore called exceptional. Now a scientist has constructed E8 for the first time, along with other exceptional 4D symmetries, in the 3D space we inhabit. These exceptional symmetries are essentially 3D phenomena in disguise.

Source: Stepping beyond our 3D world