Anatoly Klypin - October 21, 2016 Dark Matter still matters I will discuss recent trends and directions in large-scale cosmological N-body simulations. Development of new techniques and production of new simulations are driven by ever increasing requirements of present and upcoming large observational projects such as BOSS, eBOSS, DES, Euclid. So far, it was a challenge for the theory to meet the requirements. I will also discuss recent and unexpected results on the growth of the largest dark matter halos in the standard cosmological model.