New shocking images have been sent by the MRO probe, which has arrived on a orbit of Mars in May 2006 and has begun its main researches in November last year.

The probe, between other discoveries, has record new images where appears a crater where has been water in the past.

There are three possibilities regarding water existence in this place.

One of them is that in underground may exist an reservoir of liquid water on a undetermined surface. Other one may be that the water has melt in the winter period and remains like this, and the third one, in winter periods, because of temperature modifications produced by regulated movements of Mars on his ax, the water could be covered by snow, where afterward has frozen.

The water has exit recently on the surface or has been lately frozen comparing with the rest of the water from the planet.