40 quintillion stellar-mass black holes are lurking in the universe, new study finds Posted on 2022/01/25 by Carl Robitaille 40 quintillion stellar-mass black holes are lurking in the universe, new study finds 40 quintillion stellar-mass black holes are lurking in the universe, new study finds https://t.co/neH3WUexig pic.twitter.com/TTnw3nd1TW— SPACE.com (@SPACEdotcom) January 24, 2022