Join my mailing list https://briankeating.com/list to win a real 4 billion year old meteorite! All .edu emails in the USA ?? will WIN! How many dimensions are there? According to string theory, there are at least 10 dimensions of space, most of which are impossible for humans to perceive. I had the pleasure of discussing this with the one and only Julian Dorey. Enjoy this short clip from our interview! If you liked this clip, check out our full interview on Julian's channel: https://youtu.be/R0G7WUqHwqw?si=nw1n588gsV-yuFyV Additional resources: ➡️ Follow me on your fav platforms: ✖️ Twitter: https://twitter.com/DrBrianKeating ? YouTube: https://www.youtube.com/DrBrianKeating?sub_confirmation=1 ? Join my mailing list: https://briankeating.com/list ✍️ Check out my blog: https://briankeating.com/cosmic-musings/ ?️ Follow my podcast: https://briankeating.com/podcast Into the Impossible with Brian Keating is a podcast dedicated to all those who want to explore the universe within and beyond the known. Make sure to subscribe so you never miss an episode! #intotheimpossible #briankeating #juliandorey ... https://www.youtube.com/watch?v=H21O-tMYaNI

#andrelinde #inflation #cosmology Andrei Linde is one of the main authors of inflationary cosmology. At present, it is the leading candidate for the theory of the very early stages of expansion of the universe and formation of its large scale structure. In this podcast Linde will describe some of the popular versions of this theory, as well as observational evidence it favor of inflationary cosmology. We also discuss Andrei’s career, the big problems in cosmology, and how Andrei invented eternal chaotic inflation which can lead to a universe which is constantly inflating, where new universes are constantly being created. Here are some of the key concepts discussed in the video: Andrei's 1986 paper about it ETERNAL CHAOTIC INFLATION http://cds.cern.ch/record/167897/files/CM-P00066672.pdf Professor Linde’s seminal book PARTICLE PHYSICS AND INFLATIONARY COSMOLOGY is available in PDF format: https://arxiv.org/pdf/hep-th/0503203.pdf Here are some videos that complement this one: Anna Ijjas: Bouncing cosmology https://youtu.be/aGlLjq4OcmE Will Kinney: An Infinity of Worlds https://youtu.be/iDsqy9QVGoI Neil Turok Endless Universes: https://youtu.be/Dt5cFLN65fI Note there are a number of alternative theories to cosmic inflation. Some of the most popular alternatives include: The ekpyrotic universe: This theory suggests that the universe began in a state of contraction, rather than expansion. The contraction would have eventually led to a singularity, at which point the universe would have bounced back into expansion. The cyclic universe: This theory is similar to the ekpyrotic universe, but it suggests that the universe goes through a series of cycles of contraction and expansion. The varying-speed-of-light universe: This theory suggests that the speed of light was not constant in the early universe. If this is true, it could explain how the universe could have expanded rapidly without violating the laws of physics. The string gas universe: This theory suggests that the early universe was filled with a gas of strings. The strings would have interacted with each other, causing the universe to expand rapidly. Leave a comment if you want to see part two! Please join my mailing list; click here ? briankeating.com/list ? Join this channel to get access to perks: https://www.youtube.com/channel/UCmXH_moPhfkqCk6S3b9RWuw/join 00:00:00 Intro 00:04:06 Particle Physics and Inflationary Cosmology 00:11:56 Hawking's 1988 A Brief History of Time and the preceding Nufield meeting. 00:12:45 When did you first consider yourself a cosmologist? 00:14:29 Do you think that multiverse and Inflation theories are related and, if so, how? 00:18:55 Inflation backround 00:19:25 The history of the universe and Einstein’s dreams of a “final theory”. 00:24:23 Why is the universe homogeneous? 00:28:36 Problems with the Big Bang Theory 00:30:21 Inflation elucidated 00:44:00 Getting an ulcer and then finding “new inflation”. Circa 1981 00:50:24 The keys to the Inflationary Model 00:55:20 How to birth a universe 01:00:00 Quantum fluctuations and the anisotropies that result 01:05:00 Galaxies are the children of quantum fluctuations 01:08:00 Testing predictions of inflation 01:24:05 Observational experimental evidence for Inflation: Planck, COBE, BICEP/Keck, LiteBIRD 01:43:14 How do you know when to STOP looking for proof of inflation? 02:02:05 What have you changed your mind about? Follow me to ask questions of my guests: ?‍♂️ Twitter: https://twitter.com/DrBrianKeating ? Join my mailing list; just click here http://briankeating.com/list ✍️ Detailed Blog posts here: https://briankeating.com/blog.php ?️ Listen on audio-only platforms: https://briankeating.com/podcast A production of http://imagination.ucsd.edu/ ... https://www.youtube.com/watch?v=Qq2OgL8Hb6o