Philosophy of Physics

The early universe is described extremely well by linear perturbations evolving in a simple expanding universe model, described by classical general relativity.  An approximately scale invariant spectrum of nearly Gaussian, adiabatic curvature fluctuations accounts for observed anisotropies in the cosmic microwave background as well as baryon acoustic oscillations.  But how does this familiar classical picture […]

Several issues in cosmology have increasingly raised concerns about self-locating uncertainty.  It seems to many that to understand how the universe originated and how it is, we need to better understand how to think about where we are in it, or where we should expect ourselves to be.  On one hand, considerations of self-locating belief […]