The 2017 Nobel Prize in Physics has been awarded to three scientists for their contributions to the so-called observation of gravitational waves. In February of last year, a team working with the LIGO gravitational wave detector announced their discovery. We are told that the instruments detected “ripples in space-time,” which were caused by the collision of two black holes a billion years ago. In Part 1 of this two-part presentation, physicist Wal Thornhill again tackles the question of gravitational waves’ existence. And he suggests that the signals cannot, in fact, have anything to do with gravity.