AAO Colloquium. Friday, 21st September 2001 - 3:30pm AAO Conference Room Old Galaxies at High Redshift Gavin Dalton Oxford University The distribution of extremely red objects (EROs) in the infra-red follow-up of the INT deep survey (ODT) is shown to exhibit strong angular clustering. This population is likely to be composed of at least three components: Young starbursting galaxies at intermediate redshifts, low-mass Galactic stars, and old galaxies at intermediate redshifts with an implied formation epoch of z~5. The delineation of these populations represents an important step in understanding the evolution of both large-scale structure and the star-formation history of the Universe.