RADICAL CONSEQUENCES. “What scientists have seen is just a little tip of an immense iceberg,’ says Antonio Teixeira, a biologist at the University of Brasilia. W Ford Doolittle, a biochemist at Dalhousie University in Nova Scotia, agrees: horizontal gene transfer, he wrote recently ‘is far more pervasive and more radical in its consequences than we could have guessed just a decade ago’.”
https://aeon.co/essays/genes-that-jump-species-does-this-shake-the-tree-of-life