“Think of life as being this book, an unfinished book for sure. We're just seeing the last few pages of each chapter. If you look out on the eight million species that we share this planet with, think of them all being four billion years of evolution. They're all the product of that. Think of us all as young leaves on this ancient and gigantic tree of life, all of us connected by invisible branches not just to each other, but to our extinct relatives and our evolutionary ancestors. As a biologist, I'm still trying to learn, with others, how everyone's related to each other, who is related to whom. Perhaps it's better still to think of us as a little fish out of water. Yes, one that learned to walk and talk, but one that still has a lot of learning to do about who we are and where we came from.”

Source: Four billion years of evolution in six minutes https://www.ted.com/talks/prosanta_chakrabarty_four_billion_years_of_evolution_in_six_minutes (April 2018)