Questions that are somehow related to the current question that you are on. sometimes follow the same subject or written by the same person, it just leads you onto other, older questions you may be interested in.
I thought I knew what siblings were but thanks to @bongo for making sense of some of the “connections.” Perhaps some of the odd threads were the result of the same questioner (because there is no other earthly reason for them to be connected)!
I have wondered why siblings don’t change at all. Unless my observation is faulty, it seems to be true that no matter how many times you come back to the same question, the siblings are always the same.