Explore the fascinating world of string theory, where tiny vibrating strings may hold the key to unifying quantum mechanics and general relativity. Dive into the mysteries of extra dimensions and the quest for a 'theory of everything.

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Credits:
Untangling String Theory
Episode 482; January 16, 2025
Produced & Narrated by:Isaac Arthur
Written & Edited by:Isaac Arthur & Jonathan Maltz
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Chris Zabriskie, "Unfoldment, Revealment"

Untangling String Theory (Narration Only)

Amid the swirling vastness of galaxies, each a cosmic city of stars and planets, the silence raises a compelling question: could the very nature of galaxies themselves hold the key to why intelligent life remains unseen?

Watch my exclusive video The Fermi Paradox: Air https://nebula.tv/videos/isaacarthur-the-fermi-paradox-air
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Credits:
The Fermi Paradox: Galactic Great Filters
Episode 484; January 30, 2025
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Phase Shift, "Forest Night"
Chris Zabriskie, "Unfoldment, Revealment"
Stellardrone, "Billions and Billions"

The Fermi Paradox: Galactic Great Filters

Discover the incredible engineering and visionary potential of Bernal Spheres, futuristic space habitats designed to sustain human life in the stars.

Watch my exclusive video Big Alien Theory https://nebula.tv/videos/isaacarthur-big-alien-theory
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Credits:
Megastructures: The Bernal Sphere
Episode 485; February 6, 2025
Written, Produced & Narrated by: Isaac Arthur
Editors: Ludwig Luska
Graphics: Bryan Versteeg, Fishy Tree, Jeremy Jozwik, Udo Schroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Phase Shift, "Forest Night"
Chris Zabriskie, "Unfoldment, Revealment", "A New Day in a New Sector"
Stellardrone, "Billions and Billions"

The Bernal Sphere

The Bernal Sphere (Narration Only)

The universe is a cold and hostile place, and may be inhabited by ruthless civilizations or machine minds, bent on destroying anything in their way.

Watch my exclusive video Big Alien Theory https://nebula.tv/videos/isaacarthur-big-alien-theory
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Credits:
Xenocide
Episode 486; February 9, 2025
Written, Produced & Narrated by: Isaac Arthur
Editors:Ludwig Luska
Graphics: Darth Biomech, LegionTech Studios
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Xenocide (Narration Only)

Xenocide

If aliens invaded, how would humanity respond? From planetary defense and space warfare to unexpected diplomatic twists, we’ll explore the strategies, technologies, and scenarios that could decide our fate.

Watch my exclusive video Post-Consciousness Civilizations: https://nebula.tv/videos/isaacarthur-postconsciousness-civilizations-evolving-beyond-human-awareness
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Credits:
We've Been Invaded By Aliens... Now What?
Episode 494a; April 13, 2025
Written, Produced & Narrated by: Isaac Arthur
Edited by: Ludwig Luska
Graphics: Jeremy Jozwik, Ken York YD Visual, Legiontech Studios
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Sergey Cheremisinov, "Labyrinth"
Markus Junnikkala, "A Fleet Behind the Moon"
Phase Shift, "Forest Night"
Chris Zabriskie, "Unfoldment, Revealment",  "A New Day in a New Sector"
Stellardrone, "Red Giant"

We've Been Invaded By Aliens... Now What?

In order to succeed in space, we must be able to produce as much as possible on-site, or ‘in situ’, but what are the most critical resources to harvest and how do we do it?

Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding
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Credits:
I.S.R.U. In-Situ Resource Utilization
Written, Narrated & Produced by: Isaac Arthur
Graphics:
Fishy Tree
Jeremy Jozwik
Ken York / YD Visual
Sergio Botero
Udo Schroeter
Music Courtesy of
Epidemic Sound Epidemic Sound http://epidemicsound.com/creator


ISRU: In-Situ Resource Utilization (Narration Only)

Forget tentacles—what matters is the mind. We explore how alien behavior might emerge from evolution, culture, and technology, and why our biggest first contact risk may be misunderstanding.

Watch my exclusive video Mass Drivers on the Moon: https://nebula.tv/videos/isaacarthur-mass-drivers-on-the-moon-enabling-a-lunar-economy
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Credits:
How Would Aliens Behave?
July 13, 2025; Episode 732
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Stellardrone, "Red Giant"
Chapters
0:00 Intro - Alien Expectations vs. Reality
4:04 The Evolutionary Roots of  Alien Behavior
8:19 From Common Ground to Alien Paths: Divergent Behaviors
13:19 First Contact: Communication & Misunderstanding
20:11 Alien Morality: Do They Even Have Ethics?
26:04 Alien Minds, Human Limits: The Final Reflection

How Would Aliens Behave? (Narration Only)

Join us as we journey beyond the birth of the universe to unravel the mysteries of what might have preceded the Big Bang—and whether time itself had a beginning.

Watch my exclusive video Mass Drivers on the Moon: https://nebula.tv/videos/isaacarthur-mass-drivers-on-the-moon-enabling-a-lunar-economy
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Credits:
Before the Big Bang - What Came Before Time?
Episode 738; July 20, 2025
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
0:00 Intro Asking the Impossible
2:08 The Limits of Time and Spacetime
7:45 Beyond the Big Bang: Alternate Beginnings
14:38 Other Realities: Higher Dimensions and Shadow Universes
18:28 Emergent Time
22:38 Bubble Collisions and Multiverse Scars
24:44 Conclusion: What Came Before Time?

Before the Big Bang - What Came Before Time?

A trip deep into the far future, to the End of Earth
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For most of human history, the end of Earth, the Universe, and Time itself were all identical, now we know the world will end in 4 billion years, long before the Universe begins to wind down. Today we will ask how we can extend that, and keep Earth around for far longer.

Watch the video version: https://youtu.be/p58yFf7aZsM

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Cover Art by Jakub Grygier: https://www.artstation.com/artist/jakub_grygier

Script Editing
Edward Nardella
Keith Blockus
Mark Warburton
Matthew Acker
MolbOrg
N Kern
Sigmund Kopperud (Wicked Woxel)

Graphics Team:
Edward Nardella
Jeremy Jozwik
Jarred Eagley
Justin Dixon
Jeremy Jozwik
Katie Byrne
Kris Holland of Mafic Stufios: www.maficstudios.com
Luuk Warringa
Mihail Yordanov
Murat Mamkegh
Nick Talmers Nieuwoudt
Pierre Demet
Sergio Botero: https://www.artstation.com/sboterod?fref=gc
Stefan Blandin

Music Supervisor
Luca De Rosa

Music:
Markus Junnikkala, "Always Tell me the odds"
Sergey Cheremisinov, "Back to Home"
Kai Engel, "Soli"
Ayreon, "Frequency Modulation"
Ayreon, "String Theory"
Ayreon, "The Theory of Everything, Part 3"
Dexter Britain, "After The Week I've Had"
Markus Junnikkala, "A Fleet Behind The Moon"
NJ Mandavilel, "The Resting Vale"
Ayreon, "Age Of Shadows"
Lombus, "Hydrogen Sonata"
Kevin MacLeod, "Spacial Winds"
Brandon Liew, "Into the Storm"

Xenocide

Isaac Arthur

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