Particle dark matter is a topic of significant interest in modern astrophysics and cosmology. This review discusses the current status of particle dark matter, including experimental evidence and theoretical motivations. It covers a wide range of dark matter candidates, with a focus on neutralinos in supersymmetric models and Kaluza-Klein dark matter in models of universal extra dimensions. The review emphasizes direct and indirect detection techniques, the constraints imposed by these experiments, and the potential reach of future experimental efforts. The review begins with an overview of the history of dark matter, starting from the anomalies in planetary motion that led to the hypothesis of unseen objects, similar to the modern dark matter problem. It then discusses the Standard Model of particle physics and cosmology, the history of the universe, and the concept of relic density. The relic density of dark matter is calculated based on thermal equilibrium and annihilation processes, with considerations for coannihilations. The review presents evidence for dark matter at various astrophysical scales, including the galactic scale, galaxy clusters, and cosmological scales. It discusses the distribution of dark matter, the role of N-body simulations, and the implications of observations such as rotation curves, gravitational lensing, and X-ray emissions. The review also covers the properties of dark matter candidates, including supersymmetric neutralinos, Kaluza-Klein particles, and superheavy candidates, and the constraints on these candidates from collider experiments. The review then discusses the various experiments used to detect dark matter, including direct detection experiments, gamma-ray experiments, neutrino telescopes, and observations at radio wavelengths. It also covers indirect detection methods, such as the observation of gamma-rays and neutrinos from the galactic center, synchrotron radiation, and high-energy neutrinos from the Sun or Earth. The review concludes with a discussion of the role of substructures and constraints from helioseismology, as well as the implications of dark matter for the overall structure of the universe. The review highlights the importance of dark matter in understanding the universe's structure and evolution, and the need for further research to determine its nature and properties. It also emphasizes the interplay between particle physics, theoretical physics, cosmology, and astrophysics in the search for dark matter.Particle dark matter is a topic of significant interest in modern astrophysics and cosmology. This review discusses the current status of particle dark matter, including experimental evidence and theoretical motivations. It covers a wide range of dark matter candidates, with a focus on neutralinos in supersymmetric models and Kaluza-Klein dark matter in models of universal extra dimensions. The review emphasizes direct and indirect detection techniques, the constraints imposed by these experiments, and the potential reach of future experimental efforts. The review begins with an overview of the history of dark matter, starting from the anomalies in planetary motion that led to the hypothesis of unseen objects, similar to the modern dark matter problem. It then discusses the Standard Model of particle physics and cosmology, the history of the universe, and the concept of relic density. The relic density of dark matter is calculated based on thermal equilibrium and annihilation processes, with considerations for coannihilations. The review presents evidence for dark matter at various astrophysical scales, including the galactic scale, galaxy clusters, and cosmological scales. It discusses the distribution of dark matter, the role of N-body simulations, and the implications of observations such as rotation curves, gravitational lensing, and X-ray emissions. The review also covers the properties of dark matter candidates, including supersymmetric neutralinos, Kaluza-Klein particles, and superheavy candidates, and the constraints on these candidates from collider experiments. The review then discusses the various experiments used to detect dark matter, including direct detection experiments, gamma-ray experiments, neutrino telescopes, and observations at radio wavelengths. It also covers indirect detection methods, such as the observation of gamma-rays and neutrinos from the galactic center, synchrotron radiation, and high-energy neutrinos from the Sun or Earth. The review concludes with a discussion of the role of substructures and constraints from helioseismology, as well as the implications of dark matter for the overall structure of the universe. The review highlights the importance of dark matter in understanding the universe's structure and evolution, and the need for further research to determine its nature and properties. It also emphasizes the interplay between particle physics, theoretical physics, cosmology, and astrophysics in the search for dark matter.