Curiosity Finds Ancient Mars Likely Had More Oxygen and Was More Hospitable to Life

New chemical science findings from NASA's Mars rover Curiosity indicate that ancient Mars likely had a higher abundance of oxygen in its atmosphere compared to the present day and was thus more hospitable to life forms, if they ever existed. Thus the Red Planet was much more Earth-like and potentially habitable billions of years ago compared to the cold, barren place we see today. Curiosity discovered high levels of manganese oxide minerals in rocks investigated at a location called "Windjana" d...