it's in here somewhere...

Cosmologists at the University of Durham have produced a map of the distribution of matter in the Universe.

The simulation took a supercomputer 11 days to produce and could help shed light on the nature of dark energy - a repulsive force thought to counteract gravity.

for dark matter, see:

http://en.wikipedia.org/wiki/Dark_matter

for dark energy, see:

http://en.wikipedia.org/wiki/Dark_energy