A new supermassive black hole puzzles scientists

Astronomers have recently found a black hole that is 12 billion times larger than the sun, it was formed about 875 million years ago after the big bang. This black hole is the largest that has been discovered. Every galaxy has a black hole, the Milky Way black hole is about 4 to 5 million times the size of our sun. The size is what has scientists so confused.