ABSTRACT
New crucial information on the relationship between nuclear black-holes and the host galaxies has been obtained from high spatial resolution spectroscopy with the Hubble Space Telescope on local objects, but also from direct inspection of the high-redshift universe with newly implemented powerful telescopes from radio to x-rays. By these means, the most active phases in galaxy evolution at high-redshifts, involving both stellar formation and black-hole gravitational accretion, have been probed in-situ.
