Bacteria have lived for millions of years in our planet where
with an impressive capability to adapt, they now colonise virtually every
environment, including us. But as tiny one-cell organisms they had to learn to work
together to be powerful enough to act on the environment and other organisms. And
now, new research has discovered that their evolution is triggered exactly by
these interactions, as scientists from Centre for Environmental Biology at the
University of Lisbon in Portugal and the Institute Pasteur in Paris show that bacteria’s
genes for secreted proteins (the ones that mediate the interactions with the
outside) evolve faster than any others in the genome. 



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