Free Post-XNA

   XNA is a synthetic form of DNA that can also copy and store information. The main differences are in the backbone, which in DNA and RNA are sugar, is replaced by one of the six alternative polymers. Also, the XNA is far more resistant to damage than DNA, actually its not even biodegradable, which allows to possibly do things DNA never could for research and the field. The fact that XNA has proved functional despite the fact that DNA and Rna only show similarities in idea and not in structural ingredients, suggest that these were "accidents", and that a variety of other forms may exist throughout the universe.
  Plus, as the synthetic DNA has the same properties as DNA the XNA could evolve, producing entirely new lifeforms. One downside to this is the fact that researchers have also created enzymes that can change DNA to XNA and vice versa allowing for information transfer between both platforms. THis is fascinating, as if alien species could use a system of this kind or another, their traits could possibly be simply transfered to us to help survival on that alien planet, but it also allows, theoretically for XNA viruses to be created. The added danger being that in their XNA form, they would far more difficult to destroy.