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

Astronomers discovered an unexpectedly hot galaxy cluster that existed just 1.4 billion years after the Big Bang, challenging current theories about galaxy cluster formation. The cluster, SPT2349-56, contains over 30 active galaxies and burns at least five times hotter than models predict for its young age. Three supermassive black holes within the cluster are pumping massive amounts of energy into the surrounding space, suggesting galaxy clusters develop much faster than previously thought and forcing a potential rethink of galactic evolution patterns.