Biogeochemical cycling of iron is crucial to many environmental processes, such as ocean
productivity, carbon storage, greenhouse gas emissions and the fate of nutrients, toxic …

The majority of life on Earth—notably, microbial life—occurs in places that do not receive
sunlight, with the habitats of the oceans being the largest of these reservoirs. Sunlight …

Microbial dispersal often leads to the arrival of outsider organisms into ecosystems. When
their arrival gives rise to successful invasions, outsider species establish within the resident …

Our understanding of Earth's rock-hosted subsurface biosphere has advanced over the past
two decades through the collection and analysis of fluids and rocks from aquifers within the …

Sediment-covered basalt on the flanks of mid-ocean ridges constitutes most of Earth's
oceanic crust, but the composition and metabolic function of its microbial ecosystem are …

Prokaryotes inhabiting in the deep sea vent ecosystem will thus experience harsh conditions
of temperature, pH, salinity or high hydrostatic pressure (HHP) stress. Among the fifty-two …

The microbiome presents great opportunities for understanding and improving the world
around us and elucidating the interactions that compose it. The microbiome also poses …

Most ecosystems on Earth exist in permanent darkness, one or more steps removed from the
light-driven surface world. This collection of dark habitats is the most poorly understood on …

Microbiological and geochemical data are presented to characterize the hydrogeochemistry
and to investigate extant microbial life in fracture waters 2.4 km below surface, at the Kidd …

Twenty-five years ago this month, Thomas Gold published a seminal manuscript suggesting
the presence of a “deep, hot biosphere” in the Earth's crust. Since this publication, a …