Do you want
The big picture that includes an oxygen free atmosphere?
Or the one with too much: https://www.npl.washington.edu/av/altvw27.html
Space/Science » in reply to If you're going to go back as far as 800,000 years, why stop there.
The big picture that includes an oxygen free atmosphere?
Or the one with too much: https://www.npl.washington.edu/av/altvw27.html