Creativity is what seperates humans from animals. Our frontal lobes, the hub of imagination, is unique to our species. It's what allows us to imagine and theorize things befrroe we make them. Knowledge is just a memory that lasts much longer than most animal's and that our brains can automatically summon up to think about using our frontal lobes.
On the uniqueness of humans...
I live. I love. I kill. I catch Pokemons. I am content.