[Renegade 13]

I will believe this guy when the overwhelming majority of the scientific community agrees with him, and then I'll take a look at the evidence. Until that time, I will believe in black holes.

As for dark matter, some evidence for it does exist. Namely, neutrinos. Neutrinos have a very tiny mass, almost non-existant. Also, their miniscule size and mass makes them very very difficult to detect, as they usually do not interact with "normal" (baryonic) matter. As a matter of fact, an absolutely huge amount of neutrinos zip right through your body over the course of your lifetime, and yet the average person only captures one neutrino over the course of their life, which tells you how often they interact with baryonic matter. Neutrinos are so numerous that they make up a substantial portion of "dark" matter. Not a huge percentage, but a measureable amount. Also, just because scientists haven't discovered fully what dark matter is, doesn't mean it doesn't exist. Take neutrinos again. There was no evidence for them for years and years, and yet they were predicted to exist. Relatively recently the predictions were proven absolutely true, every star produces tons of them through nuclear fusion (at least, the sun does).

Just because no proof exists, doesn't mean the prediction is incorrect, and just because some supposed proof does exist, doesn't mean the theory is correct.