Curiosity is simple.
It is a strong desire to know or learn something. When thinking about curiosity, most people are reminded of children. They are playful, explorative, creative - and constantly questioning the world around them.
When things are new or beyond their understanding, children ask away. Why is it that curiosity fades as we grow older? Perhaps because as we advance in age, education and in our careers, we are expected to be experts, filled to the brim with answers rather than questions.