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In nature, proteins sweep up nanoparticles

he search for the earliest indications of life on Earth, as well as help determine whether planets like Mars once harbored life. Scientists involved in this research hunt for biosignatures, which are the telltale calling cards left behind by microbes that may have lived eons ago. The presence of fine particulate sulfides in minerals is one such biosignature, although it is only suggestive of life. Now, the presence of sulfide nanoparticles intermingled with proteins promises to be a definitive biosignature.


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Source:DOE/Lawrence Berkeley National Laboratory


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