Imagine engineering projects so vast they mold galaxies into new shapes. We’ll explore the staggering feats of Kardashev-3 and beyond civilizations, crafting CARD galaxies, Birch Planets, and even rearranging superclusters.

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Credits:
Spaceport Innovations - Designing the Next Generation of Launch Sites
August 3, 2025; Episode 746
Written, Produced & Narrated by: Isaac Arthur
Galaxy-Scale Megastructures & Kardashev-3 Civilizations
Written by: Isaac Arthur
Editor: Darius Said 
Graphics: Jeremy Jozwik, Ken York, Sergio Botero, Steve Bowers
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Stellardrone, "Endeavour", "Red Giant", &"Billions and Billions"

Galaxy-Scale Megastructures & Kardashev-3 Civilizations (Narration Only)

What do snake oil, N-rays, and cold fusion have in common? They’re all cautionary tales reminding us why skepticism is essential to science—and to our future.


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Credits:

The Great Scientific Scams - From Snake Oil to Cold Fusion

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images 

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

The Great Scientific Scams - From Snake Oil to Cold Fusion (Narration Only)

What do snake oil, N-rays, and cold fusion have in common? They’re all cautionary tales reminding us why skepticism is essential to science—and to our future.



Watch my exclusive video Dark Biospheres: https://nebula.tv/videos/isaacarthur-dark-biospheres-life-on-worlds-without-sunlight

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Credits:

The Great Scientific Scams - From Snake Oil to Cold Fusion

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images 

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

The Great Scientific Scams - From Snake Oil to Cold Fusion

Are we alone, or just looking for the wrong kind of aliens? Discover how the path to hive minds and distributed consciousness might answer the Fermi Paradox — and pose new dilemmas of their own.



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Credits:

The Fermi Paradox & The Hivemind Dilemma

Written, Produced & Narrated by: Isaac Arthur

Editor: Lukas Konecny

Select imagery/video supplied by Getty Images 

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

The Fermi Paradox & The Hivemind Dilemma (Narration Only)

Rogue planets wander the cosmos without stars, but could we still call them home? This episode dives into how humanity might transform these frozen giants into thriving outposts of civilization.

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Credits:
Colonizing Rogue Planets
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Colonizing Rogue Planets

What happens after intelligence explodes beyond human comprehension? We explore a world shaped by superintelligence, where humanity may ascend, adapt — or disappear.

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Credits:
After the Singularity - What Life Would Be Like If A Technological Singularity Happened?
Written, Produced & Narrated by: Isaac Arthur
Editors: Lukas Konecny
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

After the Singularity - What Life Would Be Like If A Technological Singularity Happened? (Narration Only)

The silence of the stars might be hiding more than an absence of life — it might conceal ancient machines, monuments, and traps from civilizations long vanished. Today, we explore these eerie cosmic echoes and the risks of unearthing them.

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Credits:
Ancient Alien Artifacts - Cosmic Relics Of A Dangerous Past
Written, Produced & Narrated by: Isaac Arthur
Script Editor: Lukas Konecny
Graphics: Sergio Botero, Udo Schroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Chapters
0:00 Intro
1:42 The Cosmic Junkyard
3:56 What Survives When Civilizations Don’t
9:31 Dangerous by Design
12:04 False Gifts and Poisoned Knowledge
15:37 We Might Already Be Inside One
19:21 Detecting the Undetectable
21:34 The Human Reaction
23:31 The Million-Year Message
24:55 Galactic Cemeteries
26:53 The Ghosts We Might Meet
28:43 The Next Artifacts

Ancient Alien Artifacts - Cosmic Relics Of A Dangerous Past (Narration Only)

We often contemplate superintelligent entities, and advances in AI and human mind augmentation may soon bring them about. But how big could they get? What would they think about? And might you, or I, one day become one ourselves?

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Credits:
Jupiter Brains & Mega Minds [2025 Extended Edition]
Written, Produced & Narrated by: Isaac Arthur
Graphics:
Jeremy Jozwik
Sergio Botero
Ken York
Select imagery/video supplied by Getty Images
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Jupiter Brains & Mega Minds (Narration Only)

Before we build cities among the stars, we’ll need factories on the Moon. Discover how lunar industry could kickstart a space-based economy and reshape the future of humanity.

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Credits:
Lunar Industrial Parks - The First Factories Beyond Earth
Written, Produced & Narrated by: Isaac Arthur
Graphics: Anthrofuturism
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Lunar Industrial Parks - The First Factories Beyond Earth

Lunar Industrial Parks - The First Factories Beyond Earth (Narration Only)

What does it take to turn the Sun into a power grid? Discover the step-by-step path from asteroid mining to a star-spanning megastructure.

Watch my exclusive video Dark Biospheres: https://nebula.tv/videos/isaacarthur-dark-biospheres-life-on-worlds-without-sunlight
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Credits:
Building a Dyson Swarm... from Scratch
Written, Produced & Narrated by: Isaac Arthur
Graphics: Bryan Versteeg, Jeremy Jozwik, Ken York Sergio Botero
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Chapters
0:00 Intro What Is a Dyson Swarm?
5:49 Gathering the Materials
9:40 Proto-Swarm: Our First Steps
13:05 Mining the Solar System
14:33 Beyond Mercury: The True Scale of the Swarm
19:10 Ghosts of Friendship Past
20:34 Building Habitats: How Much Mass Do We Really Need?
27:42 The Long Dawn of a Stellar Civilization