Back in January, I shot a couple a videos with Sean Carroll at the 229th American Astronomical Meeting. Well, at last here is the second video from that day where I asked Sean - "What was before the Big Bang?". This is probably one of the most commonly asked questions I get as an astronomer, so check out what a true expert on the subject thinks about this question in just under 3 minutes! ::More about this Video:: ► Sean Carroll: "From Eternity to Here" book available on Amazon: https://www.amazon.com/Eternity-Here-Quest-Ultimate-Theory/dp/0452296544 ► Sean Carroll's blog "Preposterous Universe" at https://www.preposterousuniverse.com/blog/ ► 229th Meeting of the American Astronomical Society: https://aas.org/meetings/aas229 ► Background music by Thomas Bergersen "Final Frontier": http://www.thomasbergersen.com ::Playlists For Channel:: Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds Cool Worlds Research ► http://bit.ly/CoolWorldsResearch Guest Videos ► http://bit.ly/CoolWorldsGuests Q&A Videos ► http://bit.ly/CoolWorldsQA Science of TV/Film ► http://bit.ly/ScienceMovies ::Follow us:: SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe Cool Worlds Lab http://coolworlds.astro.columbia.edu Twitter https://twitter.com/david_kipping Instagram https://www.instagram.com/cool.worlds THANKS FOR WATCHING!!