What is so BIG that ... ?

LIGO - Laser Interferometer Gravitational Wave Observatory was the detector. It has found the most elusive of all cosmic vibrations. One hundred years ago Einstein said they were possible - so mind-bending he changed his opinion twice. A mathematician in the WWI trenches confirmed their theoretical existence and then ... Well this story is so big it'll take two podcasts. Welcome to our Shirtloads "Gravitational Wave Special Part One" and the Associate Head for Research at the School of Physics, Sydney University, Professor Geraint Lewis.  Dark energy, gravitational lensing, galactic cannibalism - our Shirtloads of Science" guest eats them for breakfast.