Sci-fi thrills us with enormous space monsters and Kaiju, but could the galaxy already be home to such leviathans?

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Credits:
Giant Space Monsters
Episode 427b; January 1, 2024
Produced, Written & Narrated by: Isaac Arthur
Graphics: Jeremy Jozwik, Ken York
Music Courtesy of:
Epidemic Sound http://epidemicsound.com/creator
Select imagery/video supplied by Getty Images

Giant Space Monsters (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?

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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 (Narration Only)

Imagine a scale that ranks civilizations not by their borders or technology, but by the sheer energy they command— some spanning entire galaxies. Join us as we explore the Kardashev Scale, the ultimate measure of cosmic power.


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Credits:
The Kardashev Scale & Population
Episode 486; February 13, 2025
Written, Produced & Narrated by: Isaac Arthur
Editors: Ludwig Luska
Graphics: Fishy Tree, Jeremy Jozwik, Ken York YD Visual
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", "Oxygen Garden"
Stellardrone, "Red Giant", "Billions and Billions"

The Kardashev Scale & Population (Narration Only)

Imagine a world stretched along a single, endless river inside a colossal space megastructure. Explore the fascinating concept of the Topopolis, a futuristic habitat billions of miles long, where humanity might thrive in a sprawling civilization bound by physics, engineering, and imagination.

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Credits:
Topopolis: The Eternal River 
Episode 487a; February 23, 2025
Written, Produced & Narrated by: Isaac Arthur
Graphics: Apogii.uk, Ken York YD Visual, Steve Bowers, Udo Scroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Topopolis: The Eternal River Space Habitat (Narration Only)

Topopolis: The Eternal River Space Habitat

Gravity Tech: The Power To  Reshape Our Civilization... And The Cosmos Themselves

Gravity Tech: The Power To  Reshape Our Civilization... And The Cosmos Themselves (Narration Only)

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.

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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?

Could we sculpt dead planets into living worlds? From artificial crusts and orbital mirrors to taming tectonics and engineering biospheres, this is your definitive guide to turning alien rocks into second Earths.

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Credits:
Interstellar Travel: Can We Survive The Long Journey?
Episode 725; June 15, 2025
Written, Produced & Narrated by: Isaac Arthur
Graphics:
Jarred Eagley
Jeremy Jozwik
Ken York YD Visual
Mafic Studios
Sergio Botero
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Chris Zabriskie, "Unfoldment, Revealment", "A New Day in a New Sector", "Oxygen Garden", "Wonder Cycle"
Kai Engel, "Endless Story About Sun and Moon"
Taras Harkavyi, "Alpha and..."
Dark Future, "Staring Through" pt1
Miguel Johnson. "The Commanders", "Far From Home"
Lombus, "Hydrogen Sonata", "Cosmic Soup"
Aerium, "Deijocht"
Stellardrone, "Red Giant", "Solar Eclipse", "Billions and Billions"

The Terraforming Compendium - From Barren Rocks to Living Worlds (Narration Only)

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?

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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)

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.

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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?

Topopolis: The Eternal River Space Habitat

Isaac Arthur

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