Human DNA isn't actually entirely human. Strangely, a lot of our genetic material came from unwanted guests hitching rides in ...

Retroviruses are a type of virus in the viral family called Retroviridae. They use RNA as their genetic material and are named for a special enzyme that’s a vital part of their life cycle — reverse ...

Very little is known about the ancient origin of retroviruses, but owing to the discovery of their ancient endogenous viral counterparts, their early history is beginning to unfold. Here we report 36 ...

The rise of the mammals may be feel like a familiar tale, but there’s a twist you likely don’t know about: If it wasn’t for a virus, it might not have happened at all. One of the few survivors of the ...