Interesting. It's known that viruses and transducing phages can incorporate host DNA into their genomes. And of course, going the opposite direction at a metal

Interesting. It's known that viruses and transducing phages can incorporate host DNA into their genomes. And of course, going the opposite direction at a metalevel, one theory of the origin of eukaryotic mitochondria is that it is of bacterial origin (an idea proposed by, among others, Lynn Margulis, who was married to Carl Sagan)... http://en.wikipedia.org/wiki/Endosymbiotic_theory http://en.wikipedia.org/wiki/Endosymbiotic_theory ...and leads to the following provocative idea: "According to Margulis and Dorion Sagan, 'Life did not take over the globe by combat, but by networking' (i.e., by cooperation). All life is a tapestry.