"A cosmic mystery of immense proportions, once seemingly on the verge of solution, has deepened and left astronomers and astrophysicists more baffled than ever. The crux... is that the vast majority of the mass of the universe seems to be missing." -William J. Broad
Three classic observations -- the Hubble expansion of the Universe, the leftover cosmic microwave background radiation, and the observed abundance of the light elements -- lead us inevitably to modeling our Universe as having begun in a hot, dense state from which it expanded and cooled. There is no other explanation that agrees…
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