This 16-minute lecture by Siddharth Prabhu from the International Centre for Theoretical Sciences explores the relationship between Feynman diagrams and conformal integrals as part of the "Positive Geometry in Scattering Amplitudes and Cosmological Correlators" program. Delve into the mathematical aspects of scattering amplitudes and their connections to cosmology, examining how perturbative on-shell scattering amplitudes relate to positive geometry, positive Grassmannian, Associahedron, and the Amplituhedron. Discover how these advanced theoretical physics concepts are pushing toward a reformulation of the perturbative S-matrix using novel principles, while also exploring the remarkable parallel structures observed in cosmological correlators that capture the fundamental physics of our Universe.