What Creates Time? | Science Festival Challenge
Julian Barbour discusses his unconventional ideas on the nature of time, entropy, and the universe's origins with Brian Greene. ⏳

World Science Festival
237.7K views • Jan 31, 2025

About this video
Scientist and author Julian Barbour joins Brian Greene to explain his heterodox views on the nature of time, entropy, and cosmic origins.
This program is part of the Big Ideas series, supported by the John Templeton Foundation.
Participant: Julian Barbour
Moderator: Brian Greene
#worldsciencefestival #briangreene #cosmology #astrophysics #JulianBarbour #NatureofTime #entropy
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ABOUT WORLD SCIENCE FESTIVAL:
The World Science Festival (WSF) is a multimedia organization bringing the most transformative ideas in science to global audiences. Through long- and short-form videos spanning physics, cosmology, quantum mechanics, biology, neuroscience, consciousness, medicine, space exploration, the dilemma of free will, artificial intelligence, engineering, robotics, and beyond. WSF gathers world-renowned scientists, artists, and thinkers for dynamic discussions, debates, lectures, performances, films, and immersive live experiences.
Founded in 2008 and headquartered in New York City, the World Science Festival is a production of the World Science Foundation, a 501(c)(3) nonprofit organization. Our mission is to cultivate a public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. With live events reaching millions worldwide and hundreds of millions of digital views, WSF continues to expand its global impact through festivals, educational initiatives like World Science U, and digital content that explores the near and far future of our world.
FOLLOW WORLD SCIENCE FESTIVAL:
Website: https://worldsciencefestival.com/
Instagram: https://www.instagram.com/worldscifest/
TikTok: https://www.tiktok.com/@worldscifest
X(Twitter): https://twitter.com/worldscifest
Facebook: https://www.facebook.com/worldsciencefestival
LinkedIn: https://www.linkedin.com/company/world-science-festival
Chapters:
0:00:00 - Introduction
0:00:52 - Welcome to Julian Barbour
0:02:07 - Barbour's background
0:07:00 - Barbour's thinking on the Nature of Time
0:14:37 - Barbour talks about Einstein
0:15:34 - Barbour illustrates the idea of point particles in space
0:22:42 - Could Newton have done a better job describing Space and Time?
0:29:15 - How to characterize Entropy and the unfolding of the Universe
0:37:44 - The Arrow of Time
0:49:59 - Past Hypothesis and Newtonian Physics
0:57:41 - Newton's Theory and General Relativity
1:01:28 - Quantum Mechanics
1:04:40 - The Wheeler-DeWitt Equation
1:10:10 - Barbour's view of how complexity arises in the Universe
1:19:35 - Barbour's view of human perception of time
1:29:35 - Conclusion
1:30:03 - Credits
What Creates Time? A Challenge to Scientific Orthodoxy
https://www.youtube.com/channel/UCShHFwKyhcDo3g7hr4f1R8A
This program is part of the Big Ideas series, supported by the John Templeton Foundation.
Participant: Julian Barbour
Moderator: Brian Greene
#worldsciencefestival #briangreene #cosmology #astrophysics #JulianBarbour #NatureofTime #entropy
Don't miss a video! Subscribe NOW: https://www.youtube.com/worldsciencefestival?sub_confirmation=1
ABOUT WORLD SCIENCE FESTIVAL:
The World Science Festival (WSF) is a multimedia organization bringing the most transformative ideas in science to global audiences. Through long- and short-form videos spanning physics, cosmology, quantum mechanics, biology, neuroscience, consciousness, medicine, space exploration, the dilemma of free will, artificial intelligence, engineering, robotics, and beyond. WSF gathers world-renowned scientists, artists, and thinkers for dynamic discussions, debates, lectures, performances, films, and immersive live experiences.
Founded in 2008 and headquartered in New York City, the World Science Festival is a production of the World Science Foundation, a 501(c)(3) nonprofit organization. Our mission is to cultivate a public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. With live events reaching millions worldwide and hundreds of millions of digital views, WSF continues to expand its global impact through festivals, educational initiatives like World Science U, and digital content that explores the near and far future of our world.
FOLLOW WORLD SCIENCE FESTIVAL:
Website: https://worldsciencefestival.com/
Instagram: https://www.instagram.com/worldscifest/
TikTok: https://www.tiktok.com/@worldscifest
X(Twitter): https://twitter.com/worldscifest
Facebook: https://www.facebook.com/worldsciencefestival
LinkedIn: https://www.linkedin.com/company/world-science-festival
Chapters:
0:00:00 - Introduction
0:00:52 - Welcome to Julian Barbour
0:02:07 - Barbour's background
0:07:00 - Barbour's thinking on the Nature of Time
0:14:37 - Barbour talks about Einstein
0:15:34 - Barbour illustrates the idea of point particles in space
0:22:42 - Could Newton have done a better job describing Space and Time?
0:29:15 - How to characterize Entropy and the unfolding of the Universe
0:37:44 - The Arrow of Time
0:49:59 - Past Hypothesis and Newtonian Physics
0:57:41 - Newton's Theory and General Relativity
1:01:28 - Quantum Mechanics
1:04:40 - The Wheeler-DeWitt Equation
1:10:10 - Barbour's view of how complexity arises in the Universe
1:19:35 - Barbour's view of human perception of time
1:29:35 - Conclusion
1:30:03 - Credits
What Creates Time? A Challenge to Scientific Orthodoxy
https://www.youtube.com/channel/UCShHFwKyhcDo3g7hr4f1R8A
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Video Information
Views
237.7K
Likes
3.4K
Duration
01:30:51
Published
Jan 31, 2025
User Reviews
4.7
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