[6SJ7]

...they show that the predictions of a model in which space consists of 12 curved pentagons joined together in a sphere agrees with the WMAP observations. Their ‘small’, closed universe should be about 30 billion light years across.

Hmm. If the universe has a boundary, doesn't that imply a frame of reference external to the universe? That would seem to violate the concept of universe.

[LibWhacker]

I think "they" would say the universe doesn't have a boundary, just as the two-dimensional surface of a sphere doesn't have a boundary (yet it does have a spherical shape).

So these guys would say our universe doesn't have a boundary either (i.e., you'll never bump into an impassable wall by moving around in it), but it does have a dodecahedral shape.

[tlb]

“Their ‘small’, closed universe should be about 30 billion light years across.”

Yet the universe estimated at 14.5 billion years old. Expansion faster then light, which they say is impossible, or a pre-existing cell being filled in by the Big Bang. Interesting choices.

“If the universe has a boundary, doesn’t that imply a frame of reference external to the universe? That would seem to violate the concept of universe.”

But not of universeS.

In fact if this theory has validity, infinite stacks of universes seem a reasonable assumption.