Scientist have placed artifical versions of silk genes in various plants (Potatoes, tobacco) and animals (goats) and, using this technology, hope to be able to mass produce silk protein for the developement of new biodegradable 'super-materials' (Scheller, Guhres, Grosse, &Conrad,2001). Gene engineered viruses have even been used to manufacture a 'green battery' which the authors claim is capable of powering an Ipod three times as long as current iPod batteries (Lee,et al., 2009)