Why Can’t the Universe Be Cyclic? Part 1: The Lure of the Eternal Universe

The Hubble Ultra Deep Field, one of the deepest views ever taken into the cosmos. Credit: NASA, ESA, and the Hubble team (public domain).

A look at why a cyclic, eternally repeating universe is such an appealing idea, and why the first serious attempt to build one, Richard Tolman’s 1930s model of endless big bangs and big crunches, collapsed under the weight of entropy. The Big Bang keeps demanding a beginning.

Universe Today
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