Showcasing RRI

Universe has undergone several crucial epochs resulting in the large-scale structure we see today. Observing these periods is the key to understanding our cosmic history. However, such observations are highly challenging due to exceptionally bright radiation from the local Universe. In this talk, I will describe the techniques for conducting high-precision measurements through custom-designed telescopes. I will discuss the challenges, their mitigations, and the recent results that shed light on these poorly constrained periods of the Universe.