>ATCV-1 exposure in mice also resulted in the altered expression of genes within the hippocampus. These genes comprised pathways related to synaptic plasticity, learning, memory formation, and the immune response to viral exposure.
Now that's maybe newsworthy. A tutorial is not, however.
Edit: contrary to my assumption, the tut was released very recently, that is today. Still, a news site is not a very good place for announcing tutorial releases, even if the guidelines are broad enough to allow it.
It's Version 0.1. That may be noteworthy in the title.
Remember, HN is not just for news. Anything that gratifies one's intellectual curiosity can be submitted here, and a tutorial does it pretty well, IMO.