4 ms·

Dark matter is probably popping into and out of all our minds, all the time, and we just don't notice it.

• labster 11y ago
  Only because we can't feel the gravity of the situation.
• peter303 11y ago
  One idea is it is a very thin gas permeating the entire galaxy. Because it does exchange photons it doesnt chemically clump together like regular matter and stays a diffuse gas concentrated only by gravity.