'How can all of this be happening?': Scientists spot massive group of ancient galaxies so hot they shouldn't exist

An inexplicably hot, fast-growing cluster of galaxies in the early universe has scientists questioning theories of galactic evolution.

'How can all of this be happening?': Scientists spot massive group of ancient galaxies so hot they shouldn't exist
An inexplicably hot, fast-growing cluster of galaxies in the early universe has scientists questioning theories of galactic evolution.

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