Originally Posted by Jens

Here is where the problem of closed versus open gets confusing to me. Even if the cosmos is closed, in the thermodynamic sense, what if it is infinite in space? Doesn't that mean that there would be an infinite amount of energy? Which would mean that entropy could never wind things down. What I'm a bit unsure of, because of the infinity, is whether entropy would work, making things ever closer to complete entropy but never reaching it, or whether the size being infinite would prevent entropy from even making a dent at all.

Also, with regard to the creation of matter, there is also the possibility I guess of recycling, where matter created somewhere is compensated by a destruction somewhere else.