I agree with the sentiments of John Bowdre. I believe science is at its best when its humble and when scientists are excited to acknowledge past theories were wrong.
This very short article points out that a leading theory for Mars’ liquid-water past — heating due to a thick CO2 greenhouse effect — is contradicted by surprising lack of carbonate rock in Curiosity’s searches.
So, what instead caused Mars to be warm enough for liquid water in its ancient history? Far from my expertise, I don’t know. But I’ll certainly keep my eye open for alternative theories.
Originally shared by Jack McDonald Burnett
How did Mars have liquid water, cold as it is? A leading theory has been disproven. Via Jess Nut