Mark is interested in cosmology, particularly the large-scale structure of galaxies, their clustering properties and evolution. He is member of the Sloan Digital Sky Survey working as a developer of their spectroscopic software which automatically measures redshifts, hence 3D positions, for nearly 1 million galaxies and quasars.  Mark is also interested in scientific visualization and 3D computer graphics, and using these as tools to make this immense cosmic map accessible to the public.