The advent of gravitational wave detectors has begun, for space and time, what we achieved for the oceans with the invention of sonar. After a 60 year struggle, we are now able to measure the ripples in space-time that are produced by the collisions of massive black holes and neutron stars. In this talk, Professor Adhikari will detail some of the ways in which we are able to measure motions that are a billion times smaller than an atom.