Don't even know which question to ask first

[GreatBigBore]

Different low-energy laws of physics.

Wait a second. The low-energy laws of physics is *us* isn't it? I mean, the laws that govern our everyday lives?

 

[Chalnoth]

Wait a second. The low-energy laws of physics is *us* isn't it? I mean, the laws that govern our everyday lives?

Yup, precisely. So it's conceivable, for instance, that a different region far away could have different decay rates for radioactive atoms, perhaps a different strength of the electromagnetic force. Stuff like that.

 

[DaveC426913]

Ok, but "out to the limits of our vision" brings me back to the question: what do we think might be there, or what might I experience if I tried to get "there"?

We would arrive back at our departure point.

And your basis for this is?

If the universe is curved and closed, it may be in the form of a 4-dimensional spheroid. Just like on a 3-dimensional sphere, if you head in one direction long enough, you will arrive back at your starting point.