Image source: https://physics.anu.edu.au/news_events/?EventID=457 One of the joys of science is delving into the deepest mysteries of the universe. What holds it all together? Part of the answer, of course, is gravity. That's the force that allows us to sit or stand without floating off into space. But it's much more than that, because without gravity, there would be no Earth and no Sun. In this episode we enjoyed a conversation with Distinguished Prof Susan Scott from the ANU. Professor Scott is one of the key people involved with the first confirmed detection of gravitational waves by the LIGO detectors. She is a passionate advocate for science and mathematics and promoting the cause of women in science. Interview by Rod.