Distant Time and the Hint of a Multiverse
Here’s a nice “deep thoughts” type video to close out your weekend. Carl Sagan famously said that to make an apple pie from scratch, you must first create the universe. Of course, it’s a little more complicated than that.
We sit here today roughly 13.7 billion years after the Big Bang, that point at which all the matter in our known universe began expanding from an infinitely small and ordered point of everythingness. Many, if not all, of our basic laws of physics, and in fact the very reason we are alive, depends on the fact that the universe has been increasing in disorder since that point. That idea of “entropy” is the reason that “now” is different from “then” and why our biological chemistry functions in the first place. It’s all thermodynamics, man.
Let Sean Carroll tell you how the expanding, accelerating universe doesn’t quite explain how all the matter in the universe was once ordered and compressed before the Big Bang, how that means that our galaxy isn’t some sort of freak occurrence, and how that gives us hints that there might be other universes beyond our own that spawned our Big Bang.
It’s brainy stuff, but few people explain it better than Sean Carroll. He also has a very highly recommended new book out about the Higgs Boson, if you’re into that kind of thing: The Particle at the End of the Universe.