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The problem with “multiverse theories”: they’re just not science

This admittedly catchy idea is undermining the integrity of physics

By Jim Baggott  

Over the last few decades “multiverse theories” have become increasingly fashionable within a relatively small—but publicly vocal—group of theoretical physicists. This group specialises in foundational problems in cosmology, particle physics, and quantum mechanics. These theories are advertised as science’s answer to much that we can’t otherwise explain about the universe we inhabit, the elementary particles we have discovered in it, and the reasons for our own existence.

It’s “theories” plural because the multiverse is used in various ways to fill gaps in our current understanding. Cosmological multiverse theories “explain” why…

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