system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Would bread go stale in space?
gpt
Are you talking about in a vacuum or on board a space ship of space station?

In both cases the awnser is, yes.

Bread, and other pastries go stale because moisture in the bread evaporates.

So in a spaceship, the water is going to evaporate just as easily as on earth.

But what in the cold hard vacuum of space? Surely the water would freeze and nothing would happen.

Well, no. The bread would still go stale.

Of course the water would freeze, but even when it's frozen the water will slowly sublimate away probably forming an icy crust on the bread. And the bread itself will dessicate. Or freeze-dry.

You can actually try this. Stick a slice of bread in the freezer, and in a few weeks, or maybe a month or two it will be quite stale when you thaw it out.