In January of 2004, twin robotic explorers, Spirit and Opportunity, landed on Mars. Expected to last for 90 days, the two rovers explored the Martian surface fo

Often thought of as a volcanically dominated planet, the last several decades of Mars exploration have revealed with increasing clarity the role of sedimentary

Planetary scientist and educator Ken Coles has teamed up with Ken Tanaka from the United States Geological Survey's Astrogeology team, and Phil Christensen, Pri

An inventory of nearly 300 megafans across five continents, describing the major morphological attributes of megafans and multi-megafan landscapes. It examines

This extensively updated new edition of the widely acclaimed Treatise on Geochemistry has increased its coverage beyond the wide range of geochemical subject ar