I’ve never really thought about Pingbacks on blog posts; they just appear. On my own blogs, most of the pingbacks are in fact internal referencing as I link from one post to another. But maybe they’re not as mundane as they might at first appear and in fact they work much harder than I first thought? When someone reads a blog post and is subsequently minded to write their own post, either referencing or extending the ideas in the original, they are extending knowledge. Were it not for the pingback, the link between the two posts would be one way only, from the body of the new post back to the original. The pingback is initiated automatically from within the original post platform and consequently makes this a two-way exchange by providing that link to the new post. This extending of the knowledge web offers opportunities, but I wonder to what extent people use it? I know that if I write a post which attracts a pingback, I usually follow it up to check out the post and the author. The outcome might be that I learn something new about what I originally thought, or that I find a new blog to follow, or a new person with whom to connect. The interesting part is that it’s an algorithm or script that’s doing that. A nonhuman. My learning is once more being affected and enabled by a nonhuman actor.