mapped the tell-tale signs of tidal disruption and destruction, providing important clues to how large galaxies have grown over time. Publications As of August 2020, Lewis has published more than 400 scientific articles, numerous articles in the popular press, and three popular science books. Where did the Universe come from? And other cosmic questions by Chris Ferrie and Geraint F. Lewis, SourceBooks (Chicago), (Sept 2021,) The Cosmic Revolutionary's Handbook: or how to beat the Big Bang by Luke A. Barnes and Geraint F. Lewis, Cambridge University Press (Feb 2020, ) A Fortunate Universe: Life in a finely tuned cosmos by Geraint F. Lewis and Luke A. Barnes, Cambridge University Press (Oct 2016, ) Dark Matter in Astroparticle and Particle Physics - Proceedings of the 6th International Heidelberg Conference, World Scientific Publishing Company, Australia, 2007, Public outreach Lewis is noted for his public speaking about astronomy on radio and at public events. He was appointed Patron of Macarthur Astronomical Society in February 2020. With his colleague, Luke Barnes, he regularly discusses astronomy, cosmology and physics at his YouTube channel Alas Lewis & Barnes. Related lists List of astronomers See also Crynant Notable Residents General Theory of Relativity References External links Geraint F. Lewis's Personal Page School of Physics, University of Sydney Directory link at IAU Living people People from Seven Sisters, Neath Port Talbot University of Sydney faculty Alumni of Queen Mary University of London Alumni of the University of Cambridge Welsh astronomers Welsh physicists 20th-century British astronomers 21st-century British astronomers 1969 births