The post, dated Oct 2, appears at John Baez Azimuth blog. Here is what I see today Oct 4th:
UPDATE: now there is a link to the chemlambda repository, but see also the comments, there and here. The real problem is related to the attitude concerning Open Science. Link to archived post.
This is the gif which illustrates the chemlambda github repository.
The original animation appeared for the first time in the chemlambda collection post Metabolism as failed replication. The later post (Sept 2016) contains more about this idea and useful links.
[ UPDATE: Recently, I deleted the chemlambda collection. The content of it will become public again in a new form. Meanwhile mail me for access. However, the github repo, libraries, demos and articles are public.]
The chemlambda molecule which is used is available at the chemlambda library of molecules, as tape_long_4653_2.mol . You can download the simulation itself (which was used to make the animation) from the Chemlambda collection of simulations at Figshare, the file tape_long_4653_2.js.
The last time when one of my animations was used withot attribution, the situations was quickly solved. I explained then that the chemlambda project is an Open Science project and that correct attribution is what is fair to do.
Now, I would expect from an academic researcher more.
Anyway, again the magic of chemlambda strikes. Let me tell you what the animation is really about. Metabolism and replication are two fundamental ingredients of life. Which came first? Are these independent? I prepared the molecule and experimented with it to show that (in the artificial toy chemistry chemlambda) metabolism and replication may be related, in the sense that metabolism may appear as failed replication.
The molecule in question is a “tape”, topologically the same as a DNA loop. On the tape there is a very small part which triggers the duplication of the tape molecule. The duplication works perfectly, there are several examples in the chemlambda collection. But this time I took a tape which duplicates without problems and I modified it in a single place. The result is a failed duplication which is spectacular in the sense that the tape molecule produces a number of disconnected graphs (i.e. other molecules), some of them are quines.