Results 131 to 140 of about 3,089 (177)
Some of the next articles are maybe not open access.
Astrobiology, 2003
A major goal of NASA's Origins Program is to find habitable planets around other stars and determine which might harbor life. Determining whether or not an extrasolar planet harbors life requires an understanding of what spectral features (i.e., biosignatures) might result from life's presence.
Carl B Pilcher
exaly +3 more sources
A major goal of NASA's Origins Program is to find habitable planets around other stars and determine which might harbor life. Determining whether or not an extrasolar planet harbors life requires an understanding of what spectral features (i.e., biosignatures) might result from life's presence.
Carl B Pilcher
exaly +3 more sources
2011
The interplay between Geology and Biology has shaped the Earth from the early Precambrian, 4 billion years ago. Moving beyond the borders of the classical core disciplines, Geobiology strives to identify cause-and-effect chains and synergisms between the geo- and the biospheres that have been driving evolution of life in modern and ancient environments.
Westall, Frances, Cavalazzi, Barbara
openaire +3 more sources
The interplay between Geology and Biology has shaped the Earth from the early Precambrian, 4 billion years ago. Moving beyond the borders of the classical core disciplines, Geobiology strives to identify cause-and-effect chains and synergisms between the geo- and the biospheres that have been driving evolution of life in modern and ancient environments.
Westall, Frances, Cavalazzi, Barbara
openaire +3 more sources
Science, 1999
The 56 Fe/ 54 Fe of Fe-bearing phases precipitated in sedimentary environments varies by 2.5 per mil (δ 56 Fe values of +0.9 to −1.6 per mil). In contrast, the 56 Fe/ 54 Fe of Fe-bearing phases in igneous rocks from Earth
B L, Beard +5 more
openaire +2 more sources
The 56 Fe/ 54 Fe of Fe-bearing phases precipitated in sedimentary environments varies by 2.5 per mil (δ 56 Fe values of +0.9 to −1.6 per mil). In contrast, the 56 Fe/ 54 Fe of Fe-bearing phases in igneous rocks from Earth
B L, Beard +5 more
openaire +2 more sources
Biological Research For Nursing, 2009
The term health is commonplace in both everyday parlance and professional discourse. Unfortunately, the term has little objective specification, especially in physiologic terms. When critically examined, even time-honored terms such as homeostasis lack specific measurable referents.
openaire +2 more sources
The term health is commonplace in both everyday parlance and professional discourse. Unfortunately, the term has little objective specification, especially in physiologic terms. When critically examined, even time-honored terms such as homeostasis lack specific measurable referents.
openaire +2 more sources
Space Science Reviews, 2007
Life, as we know it, is based on carbon chemistry operating in an aqueous environment. Living organisms process chemicals, make copies of themselves, are autonomous and evolve in concert with the environment. All these characteristics are driven by, and operate through, carbon chemistry.
Roger E. Summons +3 more
openaire +1 more source
Life, as we know it, is based on carbon chemistry operating in an aqueous environment. Living organisms process chemicals, make copies of themselves, are autonomous and evolve in concert with the environment. All these characteristics are driven by, and operate through, carbon chemistry.
Roger E. Summons +3 more
openaire +1 more source
Biosignatures for Astrobiology
Advances in Astrobiology and Biogeophysics, 2019This book aims at providing a brief but broad overview of biosignatures. The topics addressed range from prebiotic signatures in extraterrestrial materials to the signatures characterising extant life as well as fossilised life, biosignatures related to space, and space flight instrumentation to detect biosignatures either in situ or from orbit.
Cavalazzi, Barbara, Westall, Frances
exaly +3 more sources