Wilkinson Microwave Anisotropy Probe
In 2003, large scale anomalies in the anisotropies of the cosmic microwave background observed by the Wilkinson Microwave Anisotropy Probe led to Luminet suggesting that the shape of the universe is a finite dodecahedron, attached to itself by paired opposite faces, forming a Poincaré homology sphere. During the following years, astronomers searched for more evidence to support this hypothesis but found none.