Minutes ago I turned on the TV and saw an item on the wall of the Big Bang Theory apartment. I didn't know what it was, googled it, and was happy to find the exact question asked on Stack Exchange.
I went to upvote the question, and strangely couldn't. I guess it has a historic lock for "the question is off-topic but has historical significance". Highly upvoted and 81k views.
The question seems pretty on-topic for me. The only thing I could find would be:
Unimportant trivia that does not add to the understanding or appreciation of the title.
Arguably that item would be "important trivia", if it's some scientific item that somehow relates to the main characters' jobs/hobbies and is perhaps referenced in an episode of the show.
Regardless, even if the item is "unimportant trivia", why does the question have a Historical Lock rather than a normal closure? There does not appear to be a closure or deletion war in the history.