Detailed observations in multi-wavelengths of our Universe up to a redshift of 6 and precise measurements & analysis of the cosmic microwave background (CMB) has left us with only a small fraction of the visible Universe that is not observed. This is the so called "dark ages" and the "Epoch of Reionization" (EoR). My interests are, on the astrophysical side, in efficient modeling of the 21(1+z)-cm from this epoch and on the technical aspect, signal processing techniques for the extraction of these signals from the much higher galactic & extragalactic foreground contamination. On a completely different note, I also work on theoretical neuroscience & neuroimaging.