A rare black hole a billion times the mass of the sun could upend our understanding of how galaxies form

A rare supermassive black hole found lurking at the dawn of the universe could indicate there were thousands more ravenous monsters stalking the early cosmos than scientists thought – and astronomers aren’t sure why.

The primordial black hole is about 1 billion times the mass of our sun and was found at the center of the galaxy COS-87259. The ancient galaxy formed just 750 million years after the Big Bang and was spotted by the Large Atacama Millimeter Array (ALMA), a radio observatory in Chile, in a tiny patch of sky less than 10 times the size of the full moon.

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