What have you created?

I remember once going up to my mom when I was about 6 or 7 and complaining that everything I thought about had already been thought of. She replied that one of the great things about growing older is that you eventually do begin to think of things that no one else has thought of yet. I have reflected on her answer since then, asking myself how I have been original; if I have brought something into this world; if I can really add something significant to the body of human knowledge.

So, collective: Have you discovered/explained/altered/created/analyzed something totally new, or in a new way? What’s your contribution to our world?