> the human genome is littered with viral genetic material accumulated over time, god knows if it's for good or for bad In some cases, we know too, e.g. syncti

> the human genome is littered with viral genetic material accumulated over time, god knows if it's for good or for bad In some cases, we know too, e.g. synctin-1 [1] is a viral protein coded by a gene integrated into the primate germ line some 25 million years ago and repurposed by our bodies to facilitate cell fusion in the development of the placenta. [1] https://en.wikipedia.org/wiki/Syncytin-1 https://en.wikipedia.org/wiki/Syncytin-1