What is Human?

My toddler and I were watching Kuka Vs Timo Boll to dispel her fear of robots next to her class. While showing this again to friends, I realised how a robot is different from human, especially in a game. Not tiring, physically or emotionally, it has no discouragement or inspiration to push itself. This is where I had the epiphany of how we can learn what it is to be human from robotics, like how they say animals make us human, or the space will let us know more about ourselves.
Why explore space