This episode is with Geraint Lewis. He is a Professor of Professor of Astrophysics at the Sydney Institute for Astronomy, part of the University of Sydney's School of Physics. His research focuses on the 'dark side of the universe', the matter and energy that shapes our cosmos. His books include 'A fortunate universe' and 'The cosmic revolutionary's handbook'. His latest book is 'Where did the universe come from' co-authored by Prof. Chris Ferrie.
In this conversation we talk about theory of gravity, quantum physics, Big Bang, Expansion of the universe?, Matter, how do the elements form?, Antimatter, Dark matter and Dark energy.
Guest info:
Website: https://www.geraintflewis.com/
Twitter: https://twitter.com/Cosmic_Horizons
Amazon: https://www.amazon.com/Geraint-F-Lewis/e/B01FRL8Y6I?ref=sr_ntt_srch_lnk_2&qid=1665204017&sr=8-2
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Timestamps:
00:00:00 Introduction
00:01:16 Do we have to presuppose the existence of the universe?
00:05:49 Something from nothing
00:07:14 'What is nothing?'
00:08:26 Theory of gravity and Quantum physics
00:14:30 Standard model in physics
00:16:17 Understanding matter
00:19:00 Why we can't include gravity at quantum level?
00:20:58 Scale matters for gravity
00:21:52 Scales for Quantum effects
00:26:46 Evidence for Big Bang
00:32:53 What is fundamental?
00:37:47 Space-time is doomed
00:43:09 Universe emerging from another universe
00:45:54 How to envision Big Bang?
00:49:16 Forces at work at the Big Bang
00:58:46 Idea of the multiverse
00:59:41 Fine tuning to produce elements in the universe
01:04:10 Are all electrons same?
01:11:00 Formation of the elements
01:14:12 How do various elements reach on the planets?
01:21:20 Antimatter and why matter exist?
01:31:29 Dark matter and Dark energy
01:34:16 Question of emergence
01:35:46 How does angular momentum get included in Dark matter models of galactic rotation?
01:39:24 Can we create a universe?
01:41:02 Thank you!