We explore the fascinating world of gravitational waves — ripples in spacetime first predicted by Einstein and confirmed a century later. The episode explains how massive cosmic events, like black hole or neutron star collisions, generate these waves and how observatories like LIGO, Virgo, and KAGRA detect them using ultra-sensitive laser interferometers. We also discuss the groundbreaking detections of GW150914 and GW170817, and the birth of gravitational wave astronomy. This discovery has opened a new era of observing the universe, allowing scientists to study phenomena previously hidden from traditional telescopes.