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Cosmic Loners
The problem with the GEODE hypothesis is that the strange objects need to resemble but not act like black holes. The only way that GEODEs could expand the universe without destroying everything around them is if they were isolated in empty pockets of the cosmos. But black holes often sit smack dab in the middle of galaxies.
“This becomes a problem if you want to explain the accelerating expansion of the universe,” lead author Kevin Croker said in a press release. “If they moved like black holes, staying close to visible matter, galaxies like our own Milky Way would have been disrupted.”