The theory of dark matter was by Jan Oort in 1932.
Fritz Zwinkey 1993
At present we do not know. It might be almost motionless, it might have a high velocity, it might have a velocity near that of light. These three hypotheses of the nature of dark are called (respectively); cold dark matter, warm dark matter, and hot dark matter.
That would be the Big Bang theory.
It is theorized that dark matter makes up 80 percent of the universe. Another theory is that 68 percent of the universe is dark energy, 27 percent is dark matter, and 5 percent is baryonic matter.
No, it is invisible, however it got gravity. No one actually come up with a theory that explain what dark matter really do, so there is still a Noble Price waiting for people to come up with a explanation of dark matter.
Not sure I understand, maybe you mean what is at the end of space?Well the most logical theory I've heard is that ever since the big bang space has been expanding, the theory is that it is expanding into dark matter, so according to that theory, after space, comes dark matter.
No light can excape what its caught in the black holes
There aren't any. Even the smallest particle of the dark matter theory, the axion, is quadrillions of times more dense than an electron.
Dark matter is matter that does not interact via the electromagnetic force. We don't really know what dark matter is, exactly; there are several possibilities. We know that it interacts via gravity, meaning it has mass. It may, or may not, or SOME of it may, interact via the weak force as well.
Current theory states that it's "dark energy".
expands and rises