Editing Heat death paradox (section)

===Modern cosmology===
The paradox does not arise in the [[Big Bang]] or its successful [[Lambda-CDM]] refinement, which posit that the universe began roughly 13.8 billion years ago, not long enough ago for the universe to have approached thermodynamic equilibrium. Some proposed further refinements, termed [[eternal inflation]], restore Kelvin's idea of unending time in the more complicated form of an eternal, exponentially-expanding multiverse in which mutually-inaccessible baby universes, some of which resemble the universe we inhabit, are continually being born.