Cyanobacteria played an important role in the evolution of Early Earth and the biosphere.
They are responsible for the oxygenation of the atmosphere and oceans since the Great …

Abstract The Archean era (4 to 2.5 billion years ago, Ga) yielded rocks that include the
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …

Uncovers the Key Role Microbes Play in the Transformation of Oxidizable and Reducible
MineralsMany areas of geomicrobial processes are receiving serious attention from …

Abstract The Mars rover Spirit encountered outcrops and regolith composed of opaline silica
(amorphous SiO2· n H2O) in an ancient volcanic hydrothermal setting in Gusev crater. An …

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 …

Biosilicification has driven variation in the global Si cycle over geologic time. The evolution
of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures …

The Martian surface is cold, dry, exposed to biologically harmful radiation and apparently
barren today. Nevertheless, there is clear geological evidence for warmer, wetter intervals in …

The recognition of past habitable environments on Mars has increased the urgency to
understand biosignature preservation in and characterize analogues of these environments …

The Transdanubian Range (Hungary, ALCAPA Unit) preserves a series of black shale-
hosted Mn-carbonate deposits and cherty, Fe-rich Mn-oxide mineralized rocks associated …

The initial steps of silica polymerization and silica nanoparticle formation have been studied
in-situ and in real-time. The experiments were carried out in near neutral pH (7–8) solutions …