Gravitational Waves are disturbances in the curvature of spacetim e , generated by accelerated masses, that prop agate as waves outward from their source at the speed of light . If that sounds like a mouthful you'd be right. But don't worry Dr. Marvin Druger is here this week to make sure we all have a better understanding of how gravitational waves work and the origin of their study. That's this week's Science on the Radio.