I realize I could easily look it up. But, what is the leading theory as to why the planet can no longer sustain liquid water. I know that in it's current condition with low gravity and lack of atmosphere it cannot sustain liquid water... But was Mars once larger?
Runaway atmosphere loss is a leading candidate due to a lack of a magnetic field (and those missing gigatons of rock)...
Slashdot Mirror
I realize I could easily look it up. But, what is the leading theory as to why the planet can no longer sustain liquid water. I know that in it's current condition with low gravity and lack of atmosphere it cannot sustain liquid water... But was Mars once larger?
Runaway atmosphere loss is a leading candidate due to a lack of a magnetic field (and those missing gigatons of rock)...