Explore the intricacies of neutrino physics in neutron star simulations through this insightful 45-minute talk delivered by Francois Foucart at the 2023 North American Einstein Toolkit School and Workshop. Delve into the complex interplay between neutrinos and neutron star dynamics, gaining valuable knowledge on cutting-edge computational techniques used in astrophysical research. Learn how these simulations contribute to our understanding of extreme cosmic events and the behavior of matter under extreme conditions.