Soldier Ant 

I'd like to spend some time with this the next time I'm in San Francisco:

As you may know, Chris Ware, one of the world’s great artists, designed this mural specifically for 826 Valencia. It depicts the parallel development of humans and their efforts at and motivations for communication, spoken and written. It’s a very complex mural, and requires its most devoted viewers to study it for about an hour, from the middle of Valenica Street, by far the best vantage point.

Oh, and here's someone's higher-res capture of the mural.