The nature of the early martian climate is one of the major unanswered questions of
planetary science. Key challenges remain, but a new wave of orbital and in situ observations …

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 …

Reconciling the geology of Mars with models of atmospheric evolution remains a major
challenge. Martian geology is characterized by past evidence for episodic surface liquid …

The surface of Mars has preserved the record of early environments in which its basaltic
crust was altered by liquid water. These aqueous environments have survived in the form of …

We present results from geomorphic map** and visible to near‐infrared spectral analyses
of the Jezero crater paleolake basin and its associated watershed. The goal of this study is …

The evidence for abundant liquid water on early Mars despite the faint young Sun is a long‐
standing problem in planetary research. Here we present new ab initio spectroscopic and …

We discuss 3D global simulations of the early martian climate that we have performed
assuming a faint young Sun and denser CO2 atmosphere. We include a self-consistent …

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 …

We use a 3‐D general circulation model to compare the primitive Martian hydrological cycle
in “warm and wet” and “cold and icy” scenarios. In the warm and wet scenario, an …

Abstract Early Mars (> 3 Ga) underwent aqueous alteration as evidenced by
fluvial/lacustrine morphologies and the recent discovery of widespread hydrous clays …