So remember when Frieza taunted Goku saying that he couldn't breathe in space?
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Well how come Bardock, Broly, Paragus, Vegeta and Nappa could
So... was Frieza lying? He clearly saw Bardock breathe in space right before he sent him back in time..
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Maybe he was trying to get Goku to stay on the planet when it exploded? Remember, Goku knows little to nothing about what the Saiyans are. He didn't know he could breathe in space. Remember he was wearing a space suit on his way to Namek?