Multiple Multiverses?
Dr Brian Keating
What is the Multiverse? and why do so many cosmologists have confidence in its reality? How many different kinds of 'Multiverse' are there? In this video, I explore the earliest notions of the Multiverse, how it is motivated by modern cosmological theories like Inflation, and how cosmologists might be able to bolster confidence in the reality of the Multiverse.
00:00 introduction 02:00 Copernican Principle 04:00 Beyond the Horizon 05:59 Fossil Relicts 11:00 Level 1 Multiverse 13:00 Inflation 14:00 Linde’s Eternal Inflation 16:45 Level 2 Multiverse and the Anthropic Universe 18:00 Anthropic Accelerating Universe 19:00 Sean Carroll, Everett Many Worlds Level 3 20:30 Level 4 : the Mathematical Universe 22:00 Can the Multiverse or inflation be falsified?
References •Challenges to the Big Bang paradigm: https://wmap.gsfc.nasa.gov/universe/bb_cosmo_infl.html
• Max Tegmark: Our mathematical universe https://www.youtube.com/watch?v=_3UxvycpqYo
• Quanta Magazine "The Multiverse's Measure Problem" https://www.quantamagazine.org/the-multiverses-measure-problem-20141103
•Weinberg's position on the Multiverse: https://www.youtube.com/watch?v=RPeXddjctaU
•Watch me & Stephen C. Meyer of the @Discovery Science debate fine-tuning in cosmology: https://www.youtube.com/watch?v=1ZvrwDtg7rQ
•Don Page: Scientists still need to explain where the multiverse came from. https://aeon.co/ideas/the-idea-of-creating-a-new-universe-in-the-lab-is-no-joke A few Images were obtained from here: https://www.forbes.com/sites/startswithabang/2021/02/25/why-do-physicists-say-a-multiverse-has-to-exist/?fbclid=IwAR2AaeAWba1nJTdC3AzzkCrRcREL7v9OLhW85sCWJfsljzOdkGPBOIqrZFc
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