PARIS (AFP) – Humans carry in their genome the relics of an animal virus that infected their forerunners at least 40 million years ago, according to research published Wednesday by the British science journal Nature. The invader is called bornavirus, a brain-infecting pathogen that was first identified in 1970s. Scientists led by Keizo Tomonaga of Japan's Osaka University compared the DNA of a range of mammals, including humans, apes, elephants, marsupials and rodents, to look for tell-tale signatures of bornavirus code. In the human genome, the team found several bornavirus fragments but also in the form of two genes that...