I have come to the conclusion that it is only feasible that if Dark matter exists than there must be 11 inverse dimensions. In M-theory there are 11 Dimensions, 1 of time , 10 of space. Our visible matter is positive in mass and dark matter is negative in mass. It seems probable that there are another 11 dimensions that are opposite of ours. 10 of antispace, 1 of antitime in which time travels in the opposite direction. Only these specefic dimensions could account for the rapid expansion of the universe.

Your thoughts most appreciated

I don't believe dark matter is negative in mass. It behaves much like ordinary mass, except that it has no interaction with the electro-magnetic force. Thus, light passes through it unhindered. The mind might be composed of dark matter, since it can pass through "solid" objects and cannot be seen on the instruments of the scientists. Dark matter does not interact with itself, except via gravity. Or at least not in any way visible to EM based instruments.

Time is an imaginary dimension, according to Stephen Hawking, and I agree. It is imaginary in the ordinary sense, being composed of our past memories and future expectations. And it is imaginary in the sense of being a continuum of imaginary numbers. The Lorentz transformation used in Special Relativity requires mathematical time to be an imaginary number. And this is the root reason why time travel is impossible.

~~Dr.H