The question “Who was the first human?” was a very popular one in our house just last year, but the evolution videos we had in the archives – even the awesome Five Fingers of Evolution TED Ed video – didn’t answer it directly enough for my kids. This visual-filled video timeline from Joe Hanson of It’s Okay to Be Smart does: There was no first human.
You can never pinpoint the exact moment that a species came to be, because it never did. Just like how you used to be a baby and now you’re older, but there was no single day when you went to bed young and woke up old…
There was no first human. It sounds like a paradox, it sounds like it breaks the whole theory of evolution, but it’s really a key to truly understanding how evolution works.
Also, your grandparents (a hundred eight-five million generations removed) were fish!