> The first results of an international effort to catalog the millions of non-human genes inside people found about 170 different bacteria species thriving in the average person's digestive tract. The study also found that people with inflammatory bowel disease had fewer distinct species inside the gut. > More than 99 percent of the different types of genes in our bodies are not in fact human, but come from microbes. > "I think it's important that people realize that we are not really human — we are a walking colony of bacteria and they are crucial for our well being...