[stacyjones (OP)]

'NASA One Step Closer to Resolving the Mystery of Dark Matter'
http://sputniknews.com/art_living/20160614/1041278923/nasa-dark-matter.html

In 2013, another study using NASA's Chandra X-ray Observatory concluded that the cosmic X-ray background radiation largely coincided with ancient cosmic infrared background radiation discovered earlier. A black hole is the only celestial object known to produce light in both of those regions of the electromagnetic spectrum.

A Universal black hole would produce light in both of those regions of the electromagnetic spectrum.

'Supermassive Black Holes Transport Matter into Cosmic Voids'
http://www.sci-news.com/astronomy/supermassive-black-holes-matter-cosmic-voids-03658.html

Some of the matter falling towards the holes is converted into energy. This energy is delivered to the surrounding gas, and leads to large outflows of matter, which stretch for hundreds of thousands of light years from the black holes, reaching far beyond the extent of their host galaxies

At the scale of our Universe the energy described above is dark energy.