There was a show once about dogs and at least with somethier uncanny ability to know when someone was due home. People wondered if they could sense/tell time.
It's turned out (or at least thier idea was) dogs sense of smell is so amazing that they van sense the "density/quantity" of their owners scent molecules. When it reached some threshold they had equated that when they would arrive back home
It's turned out (or at least thier idea was) dogs sense of smell is so amazing that they van sense the "density/quantity" of their owners scent molecules. When it reached some threshold they had equated that when they would arrive back home