The roughly factor of ten decline in the star formation rate of the universe over the last 8 billion years has contributed to a change in the optical and infrared properties of galaxies. Luminous infrared galaxies (LIRGs), rare locally, contribute 70% of the IR energy density of the universe at z=1, and therefore account for a significant fraction of the SFR density decline since then. We find that in GOODS-N, above z=0.5 roughly half of LIRGs are spirals. Whereas the rare low-z LIRGs are dominated by mergers. We also find that the IR evolution of GOODS-N galaxies is accompanied by an optical luminosity decline, consistent with an exponential decline in the SFR with an e-folding time of 3 Gyr. Finally, we demonstrate how a combination of high resolution adaptive optics and Hubble space telescope images may reveal the sites of significant star formation in distant LIRG disks and teach us about the triggers of star formation at z=1.