What happens to the human body in space?
Firstly, the vacuum of space will pull the air from your body. So, if there's air left in your lungs, they will rupture. Then oxygen in the rest of your body will also expand and one will balloon up twice to their normal size.
Secondly, any exposed liquid on your body will begin to vaporize. So, the surface of your tongue and eyes will boil. Without air in your lungs, blood will stop sending oxygen to your brain.
The ordinary awakener would pass out after about 30 seconds, and approximately 180 seconds after exposure, they would die.
Those words were still fresh in Zera's head as he easily swam in the vast expanse of space without even the slightest bit of discomfort.