The Standard Model of particle physics has been remarkably successful in describing a wide range of physical phenomena. However, it has notable omissions, particularly when confronted with astrophysical and cosmological observations. In this talk, I will discuss how such observations offer a window into physics beyond the Standard Model. Specifically, I will explore potential sources of parity violation in the early Universe, searches for signals in the dark sector, and novel probes of intergalactic magnetic fields.