Julian Barbour: The Janus Point and the Arrow of Time (#180)

Julian Barbour is the author of the highly regarded The Discovery
of Dynamics and the bestseller The End of Time and now, The Janus
Point. He received his PhD in physics from the University of
Cologne in 1968. He is a past visiting professor of physics at the
University of Oxford and lives on the edge of the scenic Cotswolds,
UK. A major new work of physics, The Janus Point will transform our
understanding of the nature of existence. In a universe filled by
chaos and disorder, Julian Barbour makes the radical argument that
the growth of order drives the passage of time — and shapes the
destiny of the universe. Time is among the universe's greatest
mysteries. Why, when most laws of physics allow for it to flow
forward and backward, does it only go forward? Physicists have long
appealed to the second law of thermodynamics, held to predict the
increase of disorder in the universe, to explain this. In The Janus
Point, physicist Julian Barbour argues that the second law has been
misapplied and that the growth of order determines how we
experience time. In his view, the big bang becomes the "Janus
point," a moment of minimal order from which time could flow, and
order increase, in two directions. Julian Barbour on "The Janus
Point: A New Theory of Time" | Videos:
https://youtube.com/watch?v=FMD8B7VRX0w&feature=share
https://www.youtube.com/watch?v=0E0NmHQ0WLc 00:00:00 Intro 00:02:57
The story of the book cover. 00:04:33 What does time mean to you?
00:05:36 The influence of Ernst Mach. 00:09:11 About the "Royal"
Zero. 00:28:30 Entaxy, thermodynamics and statistcal mechanics.
00:35:57 The cyclic universe. 00:41:28 The theoretical virtues of
the Janus Point. 00:55:05 Is there a necessity for a theory of
quantum gravity? 01:07:00 What is the failure of the "singularity"
theory of cosmogenesis? 01:09:00 The essence of the Janus Point
theory. 01:17:58 The Borde-Guth-Vilenkin Theorem 01:21:25 How do
you reconcile the Janus Point Paradigm with current observations?
01:38:00 What would you put on a timeless monolith? 01:43:00 What
is now possible that you once thought was not as a younger man?
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