|Which Way is Up?|
We have seen much evidence for lava flows in this region that flowed to much higher levels than the present surface, then deflated or drained away.
|Search for the Mars 2 Debris Field|
The Soviet Mars 2 lander was the first man-made object to touch the surface of the Red Planet when it crashed landed on 27 November 1971.
|Hardened Dunes in Arcadia Planitia|
There are several lines of evidence indicating that the dunes have become hardened into cohesive sediment or even into sandstone rock.
|Sand Sources Near Athabasca Valles |
This image shows a small channel cutting into young volcanic lavas in a region where massive catastrophic flooding took place in the relatively recent past.