posted on Jan, 4 2013 @ 08:38 PM
reply to post by schuyler
Mars did have large oceans of liquid water many eons ago. The reason why Mars lost this water is the failing of the Mars Magnetic Field. A planet
such as Mars and Earth create a Magnetic Field around the planet which protects the planet from Solar radiation and cosmic rays.
This Magnetic Field is generated by a rocky planets spinning molten liquid metalic outer core. As a planets interior cools this liquid core stops
spinning as it becomes more solid. Earth still has a molten liquid metalic core because of an impact with another Mars size planet.
This impact increased Earths core temps. and it is still very hot and thus a spinning liquid to this day. The Mars core has already cooled and thus
without a spinning outer core...the Magnetic Field has failed. The failure of this field caused the Mars Oceans to be burned off by bombardment of
various forms of radiation.
Such bombardment would also kill any life on the surface and this ment that there was not enough time for the evolution of any intelligent species.
Life may still exist on Mars but it would be sub-surface and Microbial in nature.