Rogue black holes may roam the Milky Way

It sounds like the plot of a sci-fi movie: rogue black holes roaming our galaxy, threatening to swallow anything that gets too close. In fact, new calculations by Ryan O'Leary and Avi Loeb (Harvard-Smithsonian Centre for Astrophysics) suggest that hundreds of massive black holes, left over from the galaxy-building days of the early Universe, may wander the Milky Way...

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