Abstract
Comparisons of microbial communities yield evidence for evolutionary stasis—that is, the organisms not changing for billions of years while the niche they occupy remains unchanged, according to J. William Schopf at the University of California, Los Angeles, and his collaborators there and at several other institutions in the United States, Australia, and Chile. More specifically, recently recognized sulfur-cycling microbial communities recovered from off the coast of South America are strikingly similar to their counterparts from fossil microbial communities in Northern and Western Australia, the researchers say. Details appeared 17 February 2015 in the Proceedings of the National Academy of Sciences (www.pnas.org/cgi/doi/10.1073/pnas.1419241112).
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