A set of papers showing viral integration into plant, arthropod, fungal, nematode, and protozoan, mammalian and human genomes

 Viral integration into the human genome had until recently been thought to be the preserve of retroviruses. It is now clear that non retroviruses, both RNA viruses and DNA viruses, have also been inserted over evolutionary time , and that this is an ongoing process. This would appear to be the driving force in evolution.