Lewis, Geraint F.: - Geraint F. Lewis is a Professor of Astrophysics at the Sydney Institute for Astronomy, University of Sydney. He undertook his undergraduate education at the University of London before gaining a Ph.D. in Astrophysics from the Institute of Astronomy, University of Cambridge. Professor Lewis is an internationally recognised astrophysicist, and has published more than two hundred papers in a diverse range of fields, including gravitational lensing, galactic cannibalism, cosmology and large-scale structure. As well as being an accomplished lecturer, he regularly engages in public outreach through public speaking, articles in the popular press, and social media.