Mars Geological Enigmas: From the Late Noachian Epoch to the Present Day presents outstanding questions on the geology of Mars and divergent viewpoints based on varying interpretations and analyses. The result is a robust and comprehensive discussion that provides opportunities for planetary scientists to develop their own opinions and ways forward. Each theme opens with an introduction that includes background on the topic and lays out questions to be addressed. Alternate perspectives are covered for each topic, including methods, observations, analyses, and in-depth discussion of the conclusions. Chapters within each theme reference each other to facilitate comparison and deeper understanding of divergent opinions.

Ices in the Solar-System: A Volatile-Driven Journey from the Inner Solar System to its Far Reaches details the evolution of ice on planetary bodies within the Solar System, including terrestrial planets and the Moon, Ceres and other dwarf planets or volatile asteroids, icy Galilean and Saturnian satellites, Triton and disparate Uranian moons, and Pluto, other Kuyper belt objects and comets. The book provides a view of different ice types throughout the Solar System, i.e., H2O, CO2, CH4, etc., that characterize icy processes on disparate bodies. Ice and icy processes at micro through macro scales are discussed. The book geographically spans the major planetary bodies of the Solar System, covering surface and subsurface geologies, geophysics and geochemistry of ices to answer questions such as the nature and extent of water ice and different frozen volatile species, how do ices give us clues to interiors and oceans, and more.