Human apes are just one small twig on the vast tree of life. We are not the big fucking deal some people think we are.

Neil Shubin tells the story of us in 'Your Inner Fish'

If contemplating the vastness of space is humbling, he tells the students, "something equally humbling is looking at the tree of life and seeing that you're one tiny little twig on this vast tree."

Our bodies are the result of all the animal bodies that have preceded us on Earth, including the fish whose "arms" are built like ours.

Every reptile, bird and mammal alive today is descended from ancient fish, and that includes us.