All over the news we see the results of the recent detection of gravity waves from the early universe. Which got me wondering: The early universe was much more dense than at the present. It therefore seems that spacetime was much more curved than it is, on average, today. Is this increased curvature apparent from studies of the CMBR? Is there any need to correct for it in calculations? Is it visually apparent when studying objects formed shortly after the big bang? Is it detectable in any manner?