Specificly this question is quite low (worst I ever seen on any SE site). So I was curious as to how it stacked against other bad questions. When I sorted the questions by votes and went to the last possible page, the lowest voted question was at -8 where the question in question (no pun inteded) does not even show. So, I just wondering if there's a lower limit in which questions are allowed to be shown?
On the front page, questions with a score of -4 and lower are not shown (the threshold is -8 on the meta site). All other question lists and search results show all posts regardless of score or closed status (unless your search takes these criteria into account). Deleted questions are never shown in any question list (only ♦moderators can see lists of deleted questions, and only by explicit request).
I see the imaginary animals question (+1/-20) as the 50th item on the list of questions by vote, which is strange: even if caching is going on, it should never have ranked that high. It should definitely be on the last page of that list. This may be a bug.