Dark Matter: The Missing Matter of the Universe as Seen by Astroparticle Physics and Astrophysics -- Particle Physics Approach to Dark Matter -- LSP as a Candidate for Dark Matter -- On the Direct Detection of Dark Matter -- Galaxy Formation and Dark Matter -- Dark Energy: The Energy Balance of the Universe within the Standard Cosmological Model -- Cosmological Parameters from Galaxy Clusters: An Introduction -- Cosmological Constraints from Galaxy Clustering -- Dark Energy and the Microwave Background -- Models of dark energy -- Accelerating Universe: Observational Status and Theoretical Implications -- Dark Matter and Dark Energy Beyond the Standard Theory of General Relativity -- The Physics of Extra Dimensions -- Dark Energy from Brane-world Gravity -- The Issue of Dark Energy in String Theory -- Modified Gravity Without Dark Matter -- Avoiding Dark Energy with 1/R Modifications of Gravity.