[Southack]

"Dark matter doesn't do much at all. It has gravity, but it neither emits nor absorbs nor reflects light. Nor does it interact with ordinary matter except by gravity."

...if it even exists. That's something that hasn't even remotely been demonstrated.

[PatrickHenry]

I hereby abandon thread.

[RightWhale]

No, it hasn't. It's kind of a waving of the arms at facts that remain to be explained.