The Mysterious Universe - Blackholes and Dark Matter
"Black holes sit at the center of every massive galaxy, a dark heart that researchers now believe is shaped by its surrounding cloud of dark matter. Astronomers observed the relationship between the two in looking at elliptical galaxies, formed when smaller galaxies merge into a football shape that contains their combined dark matter.
It's unclear how dark matter guides the growth of these black holes, but new findings indicate that the more dark matter a galaxy contains, the bigger its black hole is."
Source: National Geographic (http://ow.ly/Jsxms
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