  Last couple of decades have been the golden age for cosmology. High quality
data confirmed the broad paradigm of standard cosmology but have thrusted upon
us a preposterous composition for the universe which defies any simple
explanation, thereby posing probably the greatest challenge theoretical physics
has ever faced. Several aspects of these developments are critically reviewed,
concentrating on conceptual issues and open questions. [Topics discussed
include: Cosmological Paradigm, Growth of structures in the universe, Inflation
and generation of initial perturbations, Temperature anisotropies of the CMBR,
Dark energy, Cosmological Constant, Deeper issues in cosmology.]
