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Published online 17 September 2009 | Nature | doi:10.1038/news.2009.924
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High window on the past
Microbiologists find living stromatolites in the Andes.
For billions of years life on Earth was dominated by stromatolites, collections of photosynthetic microorganisms and calcareous concretions that formed dome-like lumps in shallow waters. Now, in a rare find, Argentinian scientists have discovered stromatolites forming today in super-salty lakes high in the Andes.
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