Bob Grant | Jan 5, 2010 | 3 min read
Traces of genetic material from non-retroviruses have unexpectedly turned up in the genomes of several mammal species, including humans. Image: National Human GenomeResearch InstituteResearchers linkurl:report;http://www.nature.com/nature/journal/v463/n7277/abs/nature08695.html in this week's issue of __Nature__ that bornaviruses, a group of negative sense RNA viruses, integrated into the DNA of humans and other primates, rodents, and elephants millions of years ago. These snippets represent a