Hurricane Earl makes me wonder how wet, wild & stormy early Mars was. How common were hurricanes, tornadoes, monsoons?
As time went on of course, Mars became Antarctica like, then finally becoming what it is today: arid, dry, thin-aired & deep cold;well below the line.
How wet & humid might early Mars have been? If the 36% of the surface in the north was covered by an immense ocean with rivers flowing into it & scattered lakes, no doubt there was alot of rain & storms.
Mars has 10% of the Earth's mass & 38% of its gravity yes? This is probably why Mars failed to stay Earthlike or Class M as Star Trek calls it.
What would Mars be like today if it had half the Earth's mass? And what would its surface gravity be?