  Lot of avenues, the black hole, the wormhole, the dark matter, the dark
energy etc. have been opened since the advent of General Theory of Relativity
in 1915. Cosmology, the physics of creation and evolution of the universe,
which was once thought to be beyond human perseverance, has now become a rich
science of highest importance. However, the theory of gravitation, the oldest
known interaction, is still not well understood. In the process of unveiling
the evolutionary history of the universe, we shall explore some facts that
suggest General Theory of Relativity is not the complete theory of gravitation.
