Comment by ClayFerguson

There is no evidence that dark matter even exists other than the fact that our universe is not expanding at the rate we think it should, based on our current theory of gravity and how much mass we can account for based on the radiation currently reaching us (light). I think it's far more likely that our theory is incomplete rather than some whole new class of invisible matter/energy being conjured into existence just to counter-balance our 1) wrong equations and/or 2) wrong observations. So many non-scientists think dark matter is proven. It isn't. It's nothing but pure conjecture.