In the Wiki article on the FLRW metric, http://en.wikipedia.org/wiki/Friedmann–Lemaître–Robertson–Walker_metric it says "the universe is nearly an isotropic and homogeneous FLRW spacetime". OK, so spacetime is globally flat, which implies that space is too. This is backed up by http://www.isciencetimes.com/articl...ed-perfect-accuracy-infinite-flat-eternal.htm which states " The scientists [at the Apache Point Observatory] translated the data into a 3-D map of the universe. What they discovered is that the universe is 'flat'...." In the same article the team leader David Schlegel says "...it's likely the universe extends forever in space..." But in a 2001 interview http://www.esa.int/Our_Activities/S...ite_or_infinite_An_interview_with_Joseph_Silk Prof. Joseph Silk pointed out that a spatially flat universe could be either infinite or finite (with the surface of a torus as an example of a flat finite space), but that the Planck satellite might be able to distinguish between the two possibilities. So, has the Planck satellite findings or Apache Point Observatory data cleared this up? If so, how? If not, why does Schlegel (and other sites) say that the universe is "probably" infinite?