[ASalazarMX]

> In general, if conservation laws are to hold, expansion must be balanced with [eventual] contraction, is that not obvious?

Why would this be? The only physics we know is the one inside our observable universe, there could be variations beyond, or even unknowable laws that don't require conservation of matter outside the edge of the universe.

Our incredibly vast universe could be a minuscule blob feeding from an incredibly vaster parent universe, in which case it could be breaking conservation infinitely from our perspective.

[shomp]

Because energy cannot be created nor destroyed

[xwolfi]

Evidently energy was created, or it would not exist, would it ? It probably can be destroyed back to the pre-energy state in some way, just not on a scale we comprehend or even care about.

I suppose we're like bubbles on a boiling pot of water when the fire stops: all this agitation spreads out on the entire volume, and sure no energy was lost, but there are so little bubbles and so much water, once the heat has spread out entirely, the whole volume of water looks pretty dead.

[shomp]

>Evidently energy was created, or it would not exist, would it ?

It is constantly transforming, but that does not signify that it was created, that is beyond the evidence