> Notice also the article has two by lines. At the top it's "by Paul Gilster" at the top of the text it's "by Peter Marinko".

It is Paul Gilster's blog. It looks like all articles there are by him, hence his byline at the top.

In this particular article he writes an introduction talking about self-replication, then says "Right now I want to introduce Peter Marinko, who today weighs in on self-replication and the problems therein", describes Marinko, and then the rest of the text is Marinko's, hence the second byline after Gilster's introduction.

Something similar happens in the next article on the site. Marinko write a length response to comments on the first article. Gilster decided that would be better as a separate article to further discussion: "When Peter wrote recently with his thoughts on reader reactions, I asked him for permission to run it as a regular post rather than a comment, because I think this is a lively question and would like to see us continue to explore it".

So that too is a post by Gilster, and so with his byline, but after an introduction it just run's Marinko's text, so has a second byline for that section.

He does the same thing on this article [1]. He wrote a review a paper, some commenter had interesting thoughts, and Gilster posted an article talking about that, introducing the commenter, and then the rest of the article was the commenter's text. So two bylines, one for the intro and one for the guest text.

It looks like the other articles on the site are just Gilster, and so only have one byline.

[1] https://www.centauri-dreams.org/2026/06/05/observations-on-t...