Quantum Mechanics

I have always had this strange gut feeling that the universe is, in some sense, new all throughout the day. Not new in the dramatic science-fiction sense, where everything resets and starts over, but new in the sense that reality seems to keep unfolding into fresh versions of itself depending on what happens next. A conversation goes one way instead of another. You decide to go out, or stay in. You send the message, or you leave it unsent. Tiny differences, and suddenly the entire shape of the day changes. ...

One of the strangest facts about reality is that there is any reality at all. Not just stars, galaxies, black holes, planets, oceans, or people. Not just matter and energy arranged in complicated ways. The deeper mystery is that there is something rather than nothing. It is such a simple question that it almost feels childish when you first ask it. But it is not childish at all. It may be the deepest question we can ask. ...