The short book "A Planet of Viruses" includes this little fact and more, it's a good read for people who want an ELI5 introduction to what's known. My only chan

The short book "A Planet of Viruses" includes this little fact and more, it's a good read for people who want an ELI5 introduction to what's known. My only change would be to have more pictures, but there's always the internet for that.