I got to go on a dig a few years ago. We were excavating a site that likely was once the ___location of a large building. My supervisor pointed out a long, shallow, obviously man-made cut in the bedrock that ended abruptly and had no obvious purpose. He said his theory is someone screwed up and started cutting the foundation in the wrong spot.

It was comforting to realize that none of my mistakes are likely to be preserved for the next few millennia.