Axions Primordial Black Holes Cosmological Structures Alternative Explanations Topological Defects Observational Evidence Mass and Gravity Massive Stars Cosmic Phenomena Weakly Interacting Massive Particles (WIMPs) LUX-ZEPLIN Experiment Self-Interaction Research Initiatives Properties and Effects Cosmic Structures Halo Mass Function Cosmological Models Detection Gravitational Effects Formation of Small Galaxies Theoretical Models Nature of Dark Matter Gravitational Lensing Cosmic Void Research Cosmic Glitch WIMPs Massless Topological Defects