• Dark matter is no longer in the darkness, because the constituents of dark matter have been finally revealed—that is, the fundamental elements that make up dark matter have been at last uncovered. What are these constituents or fundamental elements then? Are they the same as those of other ordinary celestial bodies? Are they extremely mysterious or amazingly simple after revealing them? • Dark matter is no longer in the darkness, because the fundamental nature of dark matter has been finally brought to light after a long wait. • Dark matter is no longer in the darkness, because the long-term unsolved, fundamental, essential and crucial problems about dark matter have been at last solved. • Dark matter is no longer in the darkness, because the long-standing mystery of dark matter has been finally unveiled.