Deciphering Biosignatures in Planetary Contexts
نویسندگان
چکیده
منابع مشابه
Zircon Formation in Impact Melts: Complications for Deciphering Planetary
Introduction: The impact history of the solar system remains controversial. Early investigation of lunar samples, returned by Apollo astronauts, led to the 'Late Heavy Bombardment' (LHB) concept [1,2] which hypothesized a sharp increase in bolide flux centered around ~3.9 Ga. Evidence for this cataclysm was first derived from whole-rock U-Pb and Rb-Sr ages [2] but subsequently more on 40 Ar-39 ...
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ژورنال
عنوان ژورنال: Astrobiology
سال: 2019
ISSN: 1531-1074,1557-8070
DOI: 10.1089/ast.2018.1903