Blogging is replication of art like the cries of young swallows to compete for the attention of a much harried hen for worms. Each cry is unique but bears similar tone to others, the many similar voices are competing for the attention of one set of ears doing their duty attending to each as fairly as it can considering how exhausting the entire excercise must be.
In the wild a blog entry probably looks like any other. A news story is published and before a few minutes pass seven thousand bloggers are hitting the same keystrokes in slight variations on each others' themes. The term "meme" came from that. Theme. Meme. Makes sense. It is also pronounced "me - me" and if you read a few million blogs, you will see why.