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1 Introduction A significant portion of prebiotic organic material on the early Earth may have been introduced by exogenous sources such as carbonaceous asteroids. Indeed, meteorites contain diverse prebiotic organic compounds, including a variety of proteinogenic and non-terrestrial amino acids [1], with amino acids serving as the building blocks of proteins and playing essential roles in numerous metabolic processes on Earth.
Abstract The first bodies to form in the Solar System acquired their materials from stars, the presolar molecular cloud and the protoplanetary disk. Asteroids that have not undergone planetary differentiation retain evidence of these primary accreted materials. However, geologic processes such as hydrothermal alteration can dramatically change their bulk mineralogy, isotopic compositions and chemistry.
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