The number of dim galaxies they observed is roughly equivalent to the number of normal galaxies in the same region of space. (discovermagazine.com)
In previous observations we could only see the most luminous galaxies in the distant past, and now we can look at more normal galaxies. (sciencedaily.com)
Indeed, black holes are found in normal galaxies as well and may even exist in the centers of all galaxies. (stsci.edu)