Rethinking Cosmology - Setting the Stage - Day 1 Session 1

Explore the opening session of a comprehensive cosmology conference that critically examines the current state and future directions of cosmological research. Begin with an introductory overview by the conference organizers who set the stage for discussions about the challenges facing the standard Λ-Cold Dark Matter (ΛCDM) cosmological model, including the significant Hubble tension exceeding 5σ statistical significance and emerging violations of the Cosmological Principle. Learn about the unprecedented observational opportunities ahead with new facilities like the Vera Rubin Observatory, DESI, Euclid, JWST, and SKA that will deliver transformative datasets starting in 2025. Discover how these developments create an urgent need to reassess fundamental cosmological assumptions and explore alternative theoretical frameworks. Continue with Lyman Page's detailed presentation on Cosmic Microwave Background (CMB) observations, examining the robustness of current measurements, addressing technical challenges and systematic uncertainties in the field, and outlining promising future observational pathways. Gain insights into how CMB polarization data remains largely untapped with over 90% of its cosmological information yet to be extracted, and understand the potential of upcoming missions like CMB-Bhārat to unlock these final frontiers of CMB science. Understand the broader context of how anomalies and tensions in current cosmological data are driving the field toward a potential paradigm shift, while exploring the interface between cosmology and fundamental physics that may guide future theoretical developments.