After the big bang, stuff started cooling. The first bits of matter/energy to form were called "type A", and they had attractive properties. Up until the 22nd century, scientists only knew of this one type of matter. They could only detect matter A, because gravitation A attracts matter A. They listed these in the old-fashioned periodic table of the elements (at a time when they mistakenly thought they could create new stable, non-isotopic matter type A, through fusion).<br /><br />Nowadays, we realize that there are other bits, B, or more accurately, B, C, and D. These bits were also present in the elementary step, but did not interact with matter A.<br /><br />Whereas Matter A forms in the relation of energy A, it was discovered that 'Matter B' only forms in the relation of energy B, and so on. This earned Hans Goldsbernandez-Washington, Ph.D., the first consecutive Nobel Prizes for the years 2111-2112.<br /><br />................................................................................ <br />........2111-discovery of matter/energy B, <br />........2112-the shuttle he built which reached <br />.................escape velocity from the amplified sound <br />.................wave created by the G-chord on an <br />.................electric guitar.<br />.................................................................................<br /><br />Therefore, to answer your historical question: Matter B and energy B, which you refer to as 'dark', do not interact with the gravitational field of A, including the black hole of A, which is the most intense gravitational field of A.