A new paper by UT Southwestern Medical Center scientists presented a study which found that bacteria in your gut are competing through bacteriophages – unique predatory bacteria harboring viruses – for dominance and greater access to nutrients. While we knew that bacteria in the gut outnumber the number of cells in the body and have a huge impact on our immune system, we were unaware that they were unleashing viruses on each other. Further studies are planned to look into how to harness this fight for the betterment of us, not just the bacteria.  See a story here.