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.

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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)

Explore the entire life story of the cosmos, from quantum flickers at the Big Bang to the distant eras of black holes and dark energy, and discover what kinds of civilizations might endure across these unimaginable spans of time.

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Credits:
Spaceport Innovations - Designing the Next Generation of Launch Sites
July 31, 2025; Episode 744
Written, Produced & Narrated by: Isaac Arthur
Epochs of the Universe - The Cosmic Clock & Civilization (July 31, 2025)
Recorded: June 2025
Written by: Isaac Arthur
Editor: Lukas Konecny
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Epochs of the Universe - The Cosmic Clock & Civilization (Narration Only)

Epochs of the Universe - The Cosmic Clock & Civilization

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.



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

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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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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 (Narration Only)

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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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)

From abiogenesis to AI, we rank the top Great Filter candidates and test them against the data to see which best explains the Fermi Paradox. Is the universe empty, or just dangerous? We explore ten filters—cosmic, biological, and civilizational—that could silence civilizations before they spread.

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Credits:
Could We Accidentally Destroy the Universe?
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator