What does it mean to be human?

As humans. we communicate, we experience feelings like love, happiness, and fear; but what truly sets us apart from other animals, is that we attempt to understand them, and attempt to understand what goes on beyond the world we know. That sense of imagination. A Cheetah, for instance, can feel fear, and happiness, but it can't express it, nor does it bother to truly understand it. Many animals mate hundreds of times during the course of their existence with countless different partners, but as humans, we feel that there is some other human, just one, that we can spend the rest of our lives with, and never tire of. Our senses are only part of the equation. The rest is the mere fact that we interpret feelings, and have the ability to think beyond what we know for certain.