Mars is dry today, but numerous precipitation-fed paleo-rivers are found across the planet's
surface. These rivers' existence is a challenge to models of planetary climate evolution. We …

Early Mars had rivers, but the cause of Mars's wet-to-dry transition remains unknown. Past
climate on Mars can be probed using the spatial distribution of climate-sensitive landforms …

Early Mars climate research has well-defined goals (MEPAG 2018). Achieving these goals
requires geologists and climate modelers to coordinate. Coordination is easier if results are …

The ancient climate of Mars remains an enigma despite the abundance of in situ and remote-
sensing data revealing hydrological activity in the past. The crux of this debate—informed by …

Landforms and deposits observed on the Martian surface suggest that Mars' early climate
supported rivers and lakes over a time span of more than a billion years. But, like Earth …

River deposits are one of the main lines of evidence that tell us that Mars once had a climate
different from today, and so changes in river deposits with time tell us something about how …

We present observations on the morphology and stratigraphy of more than 400 paleolake
basins on Mars. We show that there are two distinct classes of Martian paleolake basins:(1) …

Fassett, CI, and Head, JW, III, 2008a, Valley network-fed, open-basin lakes on Mars:
Distribution and implications for Noachian surface and subsurface hydrology: Icarus, v. 198 …

Earlier analyses of valley networks on Mars often concluded that they were poorly
integrated, immature drainage systems. Consequently, surface runoff from precipitation was …

Outflow channels on Mars are interpreted as the product of gigantic floods due to the
catastrophic eruption of groundwater that may also have initiated episodes of climate …