Black holes are gluttons, sucking in everything nearby with their immense gravitational fields. In the early stages of the universe, however, black holes had slim pickings on which to feed, a new study suggests. What's more, they had only themselves to blame.rnNot everyone realizes that black holes emit copious radiation. The rays don't come from the holes themselves, of course, but from the heated and compressed matter hurtling toward them. The radiation heats other nearby ordinary matter, which typically falls into the black hole like all the rest. But in the early universe, say Marcelo A.
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