PARADIGM SHIFT: “A paradigm shift because, until now, horizontal transfer has been seen as very rare in animal species. It’s actually a lot more common than we think….the hAT transposon invasion occurred about 30 million years ago and spread across at least two continents. The hAT transposon does not occur in humans, but some 45% of our genome is of transposon origin.”It’s like a pandemic, and one that can infect species that weren’t genetically or geographically close….””
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http://www.newscientist.com/article/dn14992-space-invader-dna-infiltrated-mammalian-genomes.html#.Ug4Iovoayc0p