At www.dailygalaxy.com/my_weblog/2017/02/spectacular-star-cluster-reveals-e... ... a spectacular star cluster reveals elusive black holes hiding inside a dense cluster of stars. Watch the video of the black hole in its hidey hole - or the flash of energy that is thought to be a black hole. They can even provide an estimated date for the star cluster - 12 billion years old. One option if link does not work is to go to www.dailygalaxy.com/my_weblog/2017/02/ and then scroll down to the story, spectacular star cluster etc.
video of black hole
12 Feb 2017