Explore the intricate connections between cosmology and particle physics in this comprehensive lecture from the III Joint ICTP-SAIFR/ICTP-Trieste Summer School on Particle Physics. Delve into advanced concepts presented by renowned speaker Kfir Blum from the Weizmann Institute, Israel, as part of the "Cosmology and Particle Physics" theme. Gain valuable insights into cutting-edge research and theories that bridge the gap between the study of the universe's largest structures and its smallest components. Enhance your understanding of fundamental physics principles and their applications in cosmological research during this engaging 1 hour and 44 minute session, which forms an integral part of the summer school program held from June 24 to July 5, 2024.