#2217 - Brian Cox

5512.572 - 5539.569 Brian Cox

Yeah. Wow. But those are models. I mean, it's important to say that it's interesting because until... So we have a hypothesis, which is strongly supported by lots of bits of evidence, that dark matter is some kind of particle. So that's the broadly, that's what you find in the textbooks. But it's true that until you find it, until you see it, then you haven't shown it to be correct.