I BELIEVE
Speaking during an interview at Trinity College, the Emeritus Professor of Cosmology and Astrophysics at the University of Cambridge explained that humans have taken about 4 billion years to get to our current state of civilisation.
But within a few centuries, it's likely machines will have taken over — and they will have billions of years ahead of them.
http://www.news.com.au/technology/science/space/aliens-likely-to-be-electronic-entities-which-have-overthrown-their-creators-says-british-cosmologist/news-story/936ca6b64431ada8c1ad3fae2a579ad7
So, us humans are the transition species between biological and non-biological life forms.
Ahhh, the gateway lifeform.