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!