Jack: The amazing thing about the miracle is not that no one's dying, it's not that the human race has become immortal. It's that it happened to everyone at the same time. Don't you see? It was instantaneous and that's a morphic event on a scale that I have never seen before. So whatever's happening to this planet, it is massive! By the way, your sodium's low.
Rex: My what?
Jack: That bleeping? It's found low sodium levels in your blood.
Gwen: You need salt.