Dark Matter

Dark matter is the skeleton (scaffolding) of the universe.  Without dark matter there would be no galaxies, stars, or life.  It doesn't interact with light.

It fills (fuels?)  the force of gravity.

~23% of the universe is dark matter, 4.6%  is atoms, and 72% is dark energy

http://www.youtube.com/watch?v=uPNmYbkY8ck

Physicists Set Strongest Limit On Mass of Dark Matter

ScienceDaily (Nov. 23, 2011) — Brown University physicists have set the strongest limit for the mass of dark matter, the mysterious particles believed to make up nearly a quarter of the universe. The researchers report in Physical Review Letters that dark matter must have a mass greater than 40 giga-electron volts. The distinction is important because it casts doubt on recent results from underground experiments that have reported detecting dark matter.

LUX results: Dark matter hunt nears final phase

The first results show LUX is the most sensitive detector in the world