Dodecahedral Universe

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When you actually go and do the computation and you say, what sort of microwave sky do you expect to see in a torus universe, it doesn't match very well," said Weeks. "But the good news then is that…if you start with a dodecahedral block of space and again hook up on the sides, then it matches quite well."

In other words, taking the density fluctuations in cosmic background radiation recorded by WMAP, the math adds up if the universe is finite and shaped like a dodecahedron.