" ... in late 2016, scientists using the Mars Reconnaissance Orbiter (MRO) found a buried ice sheet at Mars’s mid-latitudes that holds about as much water as Lake Superior. But until Dundas’s study, published today in Science, scientists struggled to understand the extent and accessibility of Mars’s subsurface ice layers.
The eight sites featured in the new study include steep banks where, much like cutting into a cake, erosion has exposed layers of rock and ice that MRO could see from overhead. The bands of ice first appear between three and six feet underground, supporting the notion that Mars’s mid-latitudes periodically saw large snowfalls millions of years ago, when Mars was tilted on its axis at a steeper angle than it is today, says Dundas." National Geographic
I don't see any Martians in these pictures, but this greatly increases the chance that humans can colonize Mars. The great majority of my forebears were among the colonizers of the New World and so I suppose I have a natural inclination toward the prospect of human colonization of Barsoom. We need to get some of us off this world so that our descendants can see Terra in the rear view mirror and think of this planet as the place where we began. pl