The human body functions, with all of its flora and fauna, in magnificent ways that we are only now starting to understand. Human cells are outnumbered some three to 10 times by bacterial cells in and on our bodies. And it's estimated that at least 11 percent of the human genome is viral in origin. We are the original genetically modified organisms.
Since the beginning of civilization humans have altered our environment and its biology to allow our civilization to thrive--from domesticating plants and animals to building shelter and tools from living organisms.