Martin Rees with Krista Tippett on "...deeper mystery,... ... related to the nature of space itself. There’s evidence, ... in the last 10 years or so that even empty space, when you take away all the dark matter and all the atoms, still exerts a kind of force. It exerts a sort of push or tension on everything.... ...even empty space has a kind of structure, and we don’t understand that at all. In fact, uh, most of us would guess that empty space does have a structure but on a