Read the comics here and here.
Okay, 289 is fairly self-indulgent. I have a minor in art history, but never get a chance to use it.
To learn more about Duchamp and the Found Art movement, click here.
It's really some interesting stuff, and it can change the way you look at everyday objects.
And, to bring things back on-topic - Seeing things in new ways is a key for advanced LEGO building, you know.