TOKYO (AFP) - Japanese scientists said Tuesday they had produced a mouse that tweets like a bird in a genetically engineered evolution which they hope will shed light on the origins of human language. A team of researchers at the University of Osaka created the animal in their Evolved Mouse Project, in which they use genetically modified mice that are prone to miscopying DNA and thus to mutations.Mutations are the driving force of evolution. We have cross-bred the genetically modified mice for generations to see what would happen, lead researcher Arikuni Uchimura told AFP.