Observations of large-scale structure have played an important role in developing our standard cosmological model and will play an essential role in our investigations of the origin of cosmic acceleration. I will illustrate how it is possible to test different models of gravity and dark energy via galaxy clustering using forthcoming cosmological galaxy surveys. Furthermore, the Dark Matter component of the LCDM standard paradigm continues to avoid being detected. I will discuss the recent proposal that the Dark Matter is comprised of Primordial Black Holes and possible observational tests to constrain this model.