What's the News From Mars This Week?

Mars was once much more oxygen rich than we thought, which is a bit of a mystery. Curiosity has done some new chemistry o some new rocks that we could tell had some interesting properties. Manganese oxide can only form through two mechanisms: One, it can be formed by microbes or two, It can be formed in the presence of both a lot of water and a lot, a lot of oxygen. That means there was a period in mars's history when there was a ton of oxygen.