The Mars 2020 mission will seek the signs of ancient life on Mars and will identify, prepare,
document, and cache a set of samples for possible return to Earth by a follow-on mission …

The mineralogy of terrestrial planets evolves as a consequence of a range of physical,
chemical, and biological processes. In pre-stellar molecular clouds, widely dispersed …

Biological activity is a major factor in Earth's chemical cycles, including facilitating CO2
sequestration and providing climate feedbacks. Thus a key question in Earth's evolution is …

Abstract The 3,430-million-year-old Strelley Pool Chert (SPC)(Pilbara Craton, Australia) is a
sedimentary rock formation containing laminated structures of probable biological origin …

Introduction to Geomicrobiology is a timely and comprehensive overview of how microbial
life has affected Earth's environment through time. It shows how the ubiquity of …

This review of material relevant to the Conference on Biosignature Preservation and
Detection in Mars Analog Environments summarizes the meeting materials and discussions …

Sulphur isotope data from early Archaean rocks suggest that microbes with metabolisms
based on sulphur existed almost 3.5 billion years ago, leading to suggestions that the …

Earth as an Evolving Planetary System, Fourth Edition discusses key topics dealing with the
evolution and interaction through time of Earth's crust, mantle, core, atmosphere …

Geothermics is an area of geophysics that studies the thermal state and history of the interior
of the Earth. Solar heat penetrates only into the topmost layers of the Earth's crust. Diurnal …

Evidence for the existence of life during the Archaean segment of Earth history (more than
2500 Myr ago) is summarized. Data are presented for 48 Archaean deposits reported to …