?
2010-03-13 12:34:19 UTC
Undetectable matter which somehow gives the universe the gravity it needs to fit the observations but is undetectable because it has no interaction with regular matter.
Dark Energy?
Great energy found in empty space. Total vacuum.
Dark Flow?
Evidence of another universe because galaxies are moving quickly in one direction towards something that is outside the horizon of our universe. Somehow something that far away has more pull than the mass and dark matter of our own universe, infinitely closer. So much for closer gravity being stronger gravity.