There was once a time when the cosmos appeared crystal-clear to the eyes of science-a ballet of matter, light, and gravity woven upon the luminous loom of Newtonian space and time. But what we now know is that clarity was illusion; the visible was merely a trace. The Dark Sector-composed of dark matter, dark energy, and other hypothesized spectral constituents like dark photons, white holes, axiverse fields, and tachyons-has since unmasked itself as the true architect of cosmic destiny.