Researchers from British Columbia University, Berkeley University and University of California they created the first evolutionary tree of a large portion of the bacterial diversity that has inhabited the Earth during the past billion years. The new work, published in Nature Ecology and Evolution, It used a massive sequencing of DNA and mathematical models to complete the phylogenetic tree and thus to evaluate the rates of diversification and extinction of bacteria. Researchers estimate that at least 1.4 - 1.9 millions of bacterial lineages exist today and that over the past billion years have become extinct 45.000-95.000 lineages, demolishing the idea that bacteria are rarely extinguished. Even so, It seems that the bacteria have evaded the mass extinctions that have occurred to various forms of life on Earth.
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