Biology
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.496...49b&link_type=abstract
In: Exo-/astro-biology. Proceedings of the First European Workshop, 21 - 23 May 2001, ESRIN, Frascati, Italy. Eds.: P. Ehrenfreu
Biology
1
Exobiology, Origin Of Life, Mars: Life
Scientific paper
It is generally believed that life on Earth arose in the presence of liquid water by the processing of organic molecules. It is likely that these reactions were catalyzed by minerals. The collection and analysis of carbonaceous meteorites and micrometeorites strongly suggest that a large fraction of the organic prebiotic molecules were extraterrestrial. To document this hypothesis, amino acids were exposed to space conditions. Ground-based irradiation of amino acids with a polarized synchrotron light beam have been conducted to document an extraterrestrial origin of biological one-handedness. The influence of different minerals on the condensation of thioesters of amino acids and on the self-organization of polypeptides has been investigated. Beagle 2, the exobiology lander of ESA 2003 Mars Express misson, is designed to search for traces of life on Mars. Rock samples were fixed to the ablative heat shield of a recoverable capsule to address the possibility that Martian sedimentary rocks may survive terrestrial atmospheric entry.
Barbier Bernard
Bertrand-Urbaniak Marylène
Boillot François
Brack André
Chabin Annie
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