How is Goku able to survive in Space? In Dragon Ball Super episode 13 after losing the Super Saiyan God power, how is Goku able to breathe and survive in space.
As we all know that Saiyans can't breathe in Space then how is he able to continue fighting with Beerus in Space in SSJ2 form?
This is just speculation but I believe Saiyans are capable of breathing in space for short periods of time unlike Freeza who can live without oxygen indefinitely.

Also assuming Super follows The battle of gods movie, Goku could still be within/close to the earth's atmosphere.

Bardock has also been seen flying through space in his special although that was technically filler.

The most likely answer is that it is simply a retcon, Akira Toriyama is known to have a bad memory when it comes to the Dragon Ball universe and so it is likely that he just simply forgot that Saiyans were incapable of doing so.