Astronomers find hundreds of 'hidden' black holes — and there may be even more

https://www.livescience.com/space/black-holes/astronomers-find-hundreds-of-hidden-black-holes-and-there-may-be-billions-or-even-trillions-more

Astronomers have discovered hundreds of hidden supermassive black holes lurking in the universe — and there may be billions or even trillions more out there that we still haven't found.

originally posted at https://stacker.news/items/858733