Science and techno world topic: Space
This study has been published in the journal 'Astrobiology'
This study has been published in the journal 'Astrobiology'
Scientists have found a Canadian fjord a territory
similar to the icy Europa, a moon of Jupiter. It is an icy environment and
sulfur, where sulfur bacteria associated with Arctic offers clues to future
missions to Europe in their search for traces of life.
Not easy to find a place on Earth where ice and join the
sulfur, as is supposed to occur on the moon Europa, but has been located in the
Borup Fiord Pass in the Canadian Arctic. In this area the yellow sulfurous
fumes contrast with the white snow of the environment, something like that show
satellite images of Jupiter.
Image: Yellow sulpher fumes in the Borup Fiord Pass (Canada).
Now U.S. researchers have found that the sulfur involved in
the life cycle of arctic microorganisms shows characteristics that can help
detect biological remains in Europe. The major space agencies like NASA
and European Space Agency (ESA) missions are already preparing for that
purpose.
"We found that elemental sulfur (S) may have a
'biosignatures' morphological, mineralogical and organic related to bacterial
activity, so if you are in Europe we suggest the possible presence of
microorganisms," explains to SINC Damhnait Gleeson study's lead author and
currently attached to the Centre for Astrobiology (CAB, INTA-CSIC).
Needle and rhomboid forms of sulfur
The 'biosignatures' are associated with forms of needle and
diamond grains of sulfur, where residues are mineralized extracellular
microorganisms and materials. Through electron microscopy and X-ray diffraction
also observed the formation of a rare form of sulfur, the 'rosickyita' on
organic components. And besides, in the sulphidic material have appeared small
amounts (parts per million) of proteins, fatty acids and other biomolecules.
"There are many evidences of the bacterial
activity," said Gleeson, who wonders if the icy crust of Europa, or the
ocean or lakes below it is assumed that there could be a similar microbial
community using sulfur as a source of energy.
The researcher developed the survey, which now publishes the
journal Astrobiology, a member of the Jet Propulsion Laboratory of NASA and the
University of Colorado (USA). He now works as a scientist in Spain CAB in Rio
Tinto, a Mars analog environment.
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