  Some seventy five years ago, the concept of dark matter was introduced by
Zwicky to explain the anomaly of galactic rotation curves, though there is no
clue to its identity or existence to date. In 1997, the author had introduced a
model of the universe which went diametrically opposite to the existing
paradigm which was a dark matter assisted decelarating universe. The new model
introduces a dark energy driven accelarating universe though with a small
cosmological constant. The very next year this new picture was confirmed by the
Supernova observations of Perlmutter, Riess and Schmidt. These astronomers got
the 2011 Nobel Prize for this dramatic observation. All this is discussed
briefly, including the fact that dark energy may obviate the need for dark
matter.
