Does aspartic acid racemization constrain the depth limit of the subsurface biosphere?

Age estimates based on aspartic acid racemization for bowhead whales (Balaena mysticetus) harvested in 1998-2000 and the relationship between racemization rate and body temperature

(2012) Cheryl Rosa et al.   MARINE MAMMAL SCIENCE

Endospore abundance, microbial growth and necromass turnover in deep sub-seafloor sediment

(2012) Bente Aa. Lomstein et al.   NATURE

Global distribution of microbial abundance and biomass in subseafloor sediment

(2012) J. Kallmeyer et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Hydrogen-limited growth of hyperthermophilic methanogens at deep-sea hydrothermal vents

(2012) H. C. Ver Eecke et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Geogas transport in fractured hard rock – Correlations with mining seismicity at 3.54km depth, TauTona gold mine, South Africa

(2011) Johanna Lippmann-Pipke et al.   APPLIED GEOCHEMISTRY

Neon identifies two billion year old fluid component in Kaapvaal Craton

(2011) Johanna Lippmann-Pipke et al.   CHEMICAL GEOLOGY

New cell extraction procedure applied to deep subsurface sediments

(2011) Jens Kallmeyer et al.   LIMNOLOGY AND OCEANOGRAPHY-METHODS

Nematoda from the terrestrial deep subsurface of South Africa

(2011) G. Borgonie et al.   NATURE

Physical limits of cells and proteomes

(2011) K. A. Dill et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Extraterrestrial amino acids in the Almahata Sitta meteorite

(2010) Daniel P. GLAVIN et al.   METEORITICS & PLANETARY SCIENCE

Sulfur Isotope Enrichment during Maintenance Metabolism in the Thermophilic Sulfate-Reducing Bacterium Desulfotomaculum putei

(2009) M. M. Davidson et al.   APPLIED AND ENVIRONMENTAL MICROBIOLOGY

Estimates of Biogenic Methane Production Rates in Deep Marine Sediments at Hydrate Ridge, Cascadia Margin

(2008) F. S. Colwell et al.   APPLIED AND ENVIRONMENTAL MICROBIOLOGY

Cell proliferation at 122 C and isotopically heavy CH4 production by a hyperthermophilic methanogen under high-pressure cultivation

(2008) K. Takai et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Environmental Genomics Reveals a Single-Species Ecosystem Deep Within Earth

(2008) D. Chivian et al.   SCIENCE