Question I hope to get answered is this. How could Mars get water that later went away? Mars is more distant from the Sun than the Earth. So picture a more distant planet first having water then the water vanishes. So why? http://earthsky.org/space/more-evidence-of-water-on-mars?mc_cid=647914f68c&mc_eid=60325daa3c
Lost it's EMF which allowed the solar wind to strip the atmosphere away amongst other reasons. Smaller with less gravity. https://en.wikipedia.org/wiki/Water_on_Mars History of rivers is supported by inverted relief structures and deltas. Oceans lack universal support but many think Mars had oceans early on. Just browse away. Plenty of info out there.
The water was lost over time. Not in an instant. I would like to see a cup of water put under Mars conditions, pressure & gravity and see how long it lasts before it is lost. Sort of like water boils at a lower temperature at a higher elevation. BTW I telephoned some professor about the same question when he was quoted in a news article. The above was his answer and I believe it. Moi r > g
