Brains are funny things. I saw the link for the first time a few hours ago, while I was on a lunch break, and immediately thought about the animal. I didn't click the link but did have a thought of "okay, that's kind of a strange topic". I went back to work, did some data analysis using pandas. Opened up HN again, and I saw the link and my brain didn't even register that this was a link I'd seen before -- it immediately assumed that it was about the python library. I didn't even think about it until I saw some comments about the animal.