Is There Another Earth? (serious)

[zaza]

it's not infinite. It in fact wraps around on itself. If you head in one direction long enough you eventually get back where you started.

Speculation. Not a fact. Just one theory amongst many.

As for your other argument, a or b? Both of your arguments imply that time has always existed, which everyone agrees is not the case.

Personally, agreed, but not everyone agrees on this either.

The use of the word "always" implies some sort of time-related function itself. A lot of big-bang-esque theories incorporate time into the structure of the Universe, therefore it makes no sense to say "what happened before...?" Time didn't exist...hence use of the word "before" is not appropriate; it implicitly applies the concept of time to time itself. It is another of those questions that sound like they are reasonable, but in fact may be meaningless. Such as "Why is blue?", or.....

of course there's the whole argument that makes this point irrelevent: If it wasn't in balance and hospitable for life, we wouldn't be here to ask why it is in balance. It has to be in balance to make the question possible in the first place.

There doesn't always have to be a why, except in the English alphabet.