Note the theory in this release is the oxygen is from a mature star releasing heavier elements, not plant life.<p>I thought oxygen detection was extremely difficult, they must have better methods now.<p>adding:<p><a href="https://news.arizona.edu/news/how-next-gen-telescopes-could-discover-extraterrestrial-oxygen" rel="nofollow">https://news.arizona.edu/news/how-next-gen-telescopes-could-...</a>