There's something strange going on with this answer (visible to 10k+ users only). I seem to recall reading exactly the same answer written by the same users some days ago. It received some comments about the aether theory, and got negative rep. Nevertheless, the current answer is dated some minutes ago.
I don't think that this is some kind of déjà-vu. I highly suspect that the original answer was deleted, and then it war repost word-by-word by the same user. I can't check my suspicions since I don't have 10k rep and I can't see deleted posts. Note that this is different from this question, since the deleted and new answers are the same (iirc).
Can anyone have a look at this?