  The talk centers around the question: Can general-relativistic description of
physical reality be considered complete? On the way I argue how -- unknown to
many a physicists, even today -- the ``forty orders of magnitude argument''
against quantum gravity phenomenology was defeated more than a quarter of a
century ago, and how we now stand at the possible verge of detecting a signal
for the spacetime foam, and studying the gravitationally-modified wave particle
duality using superconducting quantum interference devices.
