102 Scott Adams: No big deal. Just oxygen on Mars. (twitter.com) posted 301 days ago by Donald17 301 days ago by Donald17 +102 / -0 6 comments share 6 comments share save hide report block hide child comments Comments (6) sorted by: top new old worst You're viewing a single comment thread. View all comments, or full comment thread. ▲ 6 ▼ – Big_Dick_Energy 6 points 301 days ago +6 / -0 Is it biogenic? If the answer is yes, then 2020 is living up to its promises. permalink save report block reply ▲ 5 ▼ – deleted 5 points 301 days ago +5 / -0 ▲ 4 ▼ – Big_Dick_Energy 4 points 300 days ago +4 / -0 Oxygen (as atmospheric O2, O3, etc.) is considered a classic biosignature, you're absolutely right, but there are abiotic mechanisms that produce it. Mars wouldn't be red if it weren't for oxygen! If you'll accept arXiv as a source, this is an interesting paper: Identifying Planetary Biosignature Impostors: Spectral Features of CO and O4 Resulting from Abiotic O2/O3 Production permalink parent save report block reply
Is it biogenic? If the answer is yes, then 2020 is living up to its promises.
Oxygen (as atmospheric O2, O3, etc.) is considered a classic biosignature, you're absolutely right, but there are abiotic mechanisms that produce it.
Mars wouldn't be red if it weren't for oxygen!
If you'll accept arXiv as a source, this is an interesting paper: Identifying Planetary Biosignature Impostors: Spectral Features of CO and O4 Resulting from Abiotic O2/O3 Production