Paul Menker is currently working on semi-analytical models of dark matter halos. The exciting question right now is how well we can play detective, tracing the world around us backwards to understand the early universe. To this end, we are developing ensembles of early universes, each of which could form distribution we see today. These models typically assume that halos are spherical, but we know this is not the case. By introducing triaxiality into the models, we hope to further constrain these ensembles, and discover novel interactions taking place during halo assembly.