Both algae and bacteria are essential inhabitants of surface waters. Their presence is of
ecological significance and sometimes of public health concern triggering various control …

The energy transition is one of the main challenges of our society and therefore a major
driver for the scientific community. To ensure a smart transition to a sustainable future …

Cyanobacteria are major primary producers in the polar and alpine regions contributing
significantly to nitrogen and carbon cycles in the cryosphere. Recent advancements in …

This review is intended to summarize the current observations of reduced carbon in Martian
meteorites, differentiating between terrestrial contamination and carbon that is indigenous to …

Oxygen accumulated in the surface waters of the Earth's oceans and atmosphere several
hundred million years before the Great Oxidation Event between 2.4 and 2.3 billion years …

This work considers the hypothetical viability of microbial nitrate-dependent Fe2+ oxidation
(NDFO) for supporting simple life in the context of the early Mars environment. This draws on …

Fe (II) oxidation coupled to nitrate reduction is a widely observed metabolism. However, to
what extent the observed Fe (II) oxidation is driven enzymatically or abiotically by …

Field research target regions within two basaltic geologic provinces are described as Earth
analogs to Mars. Regions within the eastern Snake River Plain of Idaho and the Big Island of …

With no large-scale granitic continental crust, all environments on Mars are fundamentally
derived from basaltic sources or, in the case of environments such as ices, evaporitic, and …

In freshwater wetlands, redox interfaces characterized by circumneutral pH, steep gradients
in O 2, and a continual supply of Fe (II) form ecological niches favorable to microaerophilic …