DNA Evidence That Humans & Chimps Share A Common Ancestor: Endogenous Retroviruses - By: Stated Clearly The Pandemic That Lasted 15 Million Years - By: PBS Eons The Irony of Viruses - By: The Atlantic Retroviruses: Microbial Supervillains - By: SciShow Retrovirus reverse transcripiton - By: Rick Ricketson retrovirus - By: Biolover2009 Virus DNA in human genome (evolution by infection) - By: Every Cell A Universe