Yes, can have oxygen without alien life
How Was Oxygen Formed In The Universe. Web near the ends of their lives, stars like the sun switch to fusing helium instead, turning it into carbon and oxygen.
Web near the ends of their lives, stars like the sun switch to fusing helium instead, turning it into carbon and oxygen.
Web near the ends of their lives, stars like the sun switch to fusing helium instead, turning it into carbon and oxygen. Web near the ends of their lives, stars like the sun switch to fusing helium instead, turning it into carbon and oxygen.
