Special Paper 483: Discoveries on other planetary bodies cannot always be easily explained. Therefore, geologic sites on this planet are used to better understand the extraterrestrial worlds we explore with humans, robots, and satellites. Analogs for Planetary Exploration is a compilation of historical accounts of astronaut geology training, overviews of planetary geology research on Mars, educational field trips to analog sites, plus concepts for future human missions to the Moon.

Special Paper 453: This volume aims to expand and update our geoscience horizons by examining various short-duration random geologic processes that have been recognized on both Earth and Mars and the preservation potential of their geologic record on Earth as compared to Mars, and by considering the effects of such processes on the evolution of Earth. A variety of topics will undoubtedly be of interest to a wide range of readers, and will provide a readily accessible way for geologists to expand their geoscience horizons.