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Explore cutting-edge cosmological research through this conference session featuring three expert presentations on high-redshift universe studies and their implications for modern cosmology. Delve into how the James Webb Space Telescope has revealed tensions in our understanding of the early universe and learn about upcoming opportunities with the Square Kilometre Array in the first talk by Tirthankar Roy Choudhury. Examine how cosmic reionization serves as a powerful tool for probing dark matter and dark energy through Girish Kulkarni's analysis of the transition from neutral to ionized hydrogen in the early universe. Discover how 21-cm radio observations provide unique constraints on high-redshift cosmological models in Saurabh Singh's presentation on neutral hydrogen signatures from the cosmic dawn era. This session forms part of the Rethinking Cosmology Conference, which addresses current challenges to the standard ΛCDM model including the Hubble tension, violations of cosmological isotropy and homogeneity, and emerging observational anomalies that may require fundamental revisions to our cosmological framework.
