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Geraint F. Lewis is a Professor of Astrophysics at the Sydney Institute for Astronomy, researching cosmology, gravitational lensing and galactic cannibalism. Geraint F. Lewis heads the Gravitational Astrophysics Group at the Sydney Institute for Astronomy, whose research covers several key areas in modern astrophysics, including deciphering the nature of the dark matter and dark energy which pervade our Universe, and understanding the evolution of galaxies out of the cosmic broth that existed shortly after the Big Bang. For this, the Gravitational Astrophysics Group use state-of-the-art computational facilities to build model universes, modifying the underlying physics and unraveling its observational consequences. This can involve following baby galaxies to maturity, or seeing how the structure of matter can influence the paths of light rays as they traverse the Universe. Audio is property of www.latenightinthemidlands.com