What did we breathe before the oxygen was discovered? It is the third-most abundant element in the universe by mass. escape room mystery word Answers. This clue is part of the famous game Escape Room Mystery Word. As you now each level shows a hint some levels have a letter that appears in the ground and some other levels show the hint a picture or object. We have solved all of them and shared the solutions in our website. Find below What did we breathe before the oxygen was discovered? It is the third-most abundant element in the universe by mass. escape room mystery word Answers:

What did we breathe before the oxygen was discovered? It is the third-most abundant element in the universe by mass. escape room mystery word Answers