Would the universe be curved

In the years of old, people debated whether the earth was flat or otherwise. If it was flat then at an appropriate height,

one should see the world end to end with no obscuration. Yet it was pointed out that one could not see the entirety

of the earth, it seemed to bend away from view at the horizon. Therefore, it was deemed curved or round.

Presently, scientists also view the universe or at least the observable universe as flat in dimension. Yet also the

far ends of the universe cannot be viewed.  Would the inability to detect the far edges be due to a long distance curving? Could it also turn out, as it did centuries ago regarding the earth, that despite evidence that

indicates the present view it is flat, perhaps with better study it may be found at the edges, curved?

Evidence of curvature started showing on data of WMAP in 2004.

A paper dated about late June 2013 by Liddle and Cortes of the UK may put a turn on this in favor of a curved universe.

It is cited that recent studies of the structure of radiation after the Big Bang indicates that distribution is uneven and may produced a lopsided universe. One also with what is dubbed 'axis of evil'. It also may indicate that it is not flat.

The paper has an additional quantum factor to address the oddities to the Standard Model at the beginning of the cosmos. They utilize the curvaton (which may go against the hyperinflation concept).

The data they utilized allows for curvature to develop but may still fit within the findings from the Planck satellite.

However, the curvaton nature researched by the authors might match with negative curvature.

They also consider how an open universe may arise. "It is tempting to think that the limit on curvature is indicating that the Universe is flat on average. However, there has been renewed motivation to consider marginally open universes...where it is quite plausible that our region of the Universe arose from decay of an meta-stable vacuum-state via bubble-nucleation. Such tunnellings , via the Coleman-de Luccia instanton, have long been known to create effective open universes, and moreover the difficulty in obtaining very large amounts of inflation within the landscape suggests that the subsequent inflation within the bubble may not last so long as to establish a universe indistinguishably close to flat."

(You are invited to read, "Is the universe curved?"-neurostar)