Can Inflation Go on Forever?

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Inflation is a theory wherein in the very, very early universe, there was a tiny moment of time when the universe underwent a hyperfast period of accelerated expansion. Inflation can end in some regions of the universe, but it doesn't have to end everywhere. The bordegut volenkin theorem does not prove the universe had a beginning. It just proves that inflation was not eternal toward the past. So we don't know. Is the answer to the question, did the universe come into existence? If it did, then you'd be forgiven for thinking that's a good reason to think something ted it, right? But if it lasted forever, then that's a less tempting

It's fun to be in the exciting, chaotic, youthful days of the podcast, when anything goes and experimentation is the order of the day. So today's show is something different: a solo effort, featuring just me talking without any guests to cramp my style. This won't be the usual format, but I suspect it will happen from time to time. Feel free to chime in below on how often you think alternative formats should be part of the mix. The topic today is "Why Is There Something Rather than Nothing?", or equivalently "Why Does the Universe Exist at All?" Heady stuff, but we're not going to back away from the challenge. What I have to say will roughly follow my recent paper on the subject, although in a more chatty and accessible style. It concerns ideas at the intersection of physics, philosophy, and theology, so tune in if you're into that sort of thing. [smart_track_player url="http://traffic.libsyn.com/seancarroll/something-nothing.mp3" social_gplus="false" social_linkedin="true" social_email="true" hashtag="mindscapepodcast" ] Big news! After a number of people have asked, I have finally opened a Patreon account for people who would like to support Mindscape in some way. You can sign up to kick in a dollar or more per podcast episode, and in return you get 1) access to occasional Ask Me Anything episodes done exclusively for patrons, and 2) my undying gratitude. If the Patreon route is successful enough, I'll forego having ads on the podcast -- we'll see how it goes. Download Episode See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.