Chasing Dreams

What if the galaxy isn’t empty—but locked in a silent Cold War between ancient alien empires? This episode explores the Dark Forest Theory, Interdiction Bubbles, and what it means if our galaxy is shaped by dormant, watchful civilizations playing a long game of survival and subtle dominance.

Watch my exclusive video Antimatter Propulsion: Harnessing the Power of Annihilation - https://nebula.tv/videos/isaacarthur-antimatter-propulsion-harnessing-the-power-of-annihilation
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Credits:
The Alien Cold War: Silent Competition Among Dormant Empires In A Dark Galaxy
Episode 497; May 1, 2025
Written, Produced & Narrated by: Isaac Arthur
Edited by: Donagh Broderick
Graphics: Darth Biomech, Jeremy Jozwik, Ken York YD Visual, LegionTech Studios, Sergio Botero
Select imagery/video supplied by Getty Images
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Markus Junnikkala, "A Fleet Behind the Moon"
Phase Shift, "Forest Night"
Kai Engel, "Endless Story About Sun and Moon"
Chris Zabriskie, "Unfoldment, Revealment", "A New Day in a New Sector", "Cylinder One"
Taras Harkavyi, "Alpha and..."
Stellardrone, "Red Giant", "Billions and Billions"

The Alien Cold War: Silent Competition Among Dormant Empires In A Dark Galaxy (Narration Only)

Made for The KVR OSC challenge using only the full bucket ragnarök synth and free plugins. No presets where used. All patches created from init. 

Ragnarök

Are we alone in the universe—or just early to the party? We’ll explore the math, models, and megastructures that might answer how many alien civilizations are out there, and why the night sky remains so quiet.

Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding

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Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isaacarthur

Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30.


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Credits:

How Many Alien Civilizations Are There?

Episode 723; June 8, 2025 

Written, Produced & Narrated by: Isaac Arthur

Editor: Ludwig Luska

Graphics: 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" 

Koalips, "Kvazar"

 Stellardrone, "Red Giant" & "Billions and Billions"

How Many Alien Civilizations Are There? (Narration Only)

Explore the real economics of building and operating a space elevator—from ship-launched ribbons to megaton climbers—and how this infrastructure could change the world.

Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur
Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isaacarthur
Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30.

Visit our Website: http://www.isaacarthur.net
Join Nebula: https://go.nebula.tv/isaacarthur
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SFIA Discord Server: https://discord.gg/53GAShE
Credits:
Space Elevator Economics: Building And Operating A Superhighway To Space 
Episode 726; June 19, 2025
Written, Produced & Narrated by: Isaac Arthur
Edited by:
Adrian Nixon
Ludwig Luska
Peter Swan
Graphics:
Anthrofuturism
Atlantis Project
Katie Byrne
Phil Swan
Sergio Botero
Udo Schroeter
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"
Aerium, "Deijocht"
Stellardrone, "Red Giant", "Billions and Billions"
Lombus, "Hydrogen Sonata", "Cosmic Soup"

Space Elevator Economics - Building And Operating A Superhighway To Space (Narration Only)

In-situ resource utilization (ISRU) is the key to building lasting colonies in space—by turning local materials into shelter, fuel, and even food. Explore how humanity might thrive beyond Earth by living off the land on other worlds.

Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur
Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isaacarthur
Use the link  https://gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $36.

Visit our Website: http://www.isaacarthur.net
Join Nebula: https://go.nebula.tv/isaacarthur
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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

Chapters:
0:00 Intro
3:20 Shelter
11:06 Extraction of Volatiles
13:45 Regolith Processing
16:55 Energy Production
18:19 Manufacturing and Construction
20:24 Agriculture
23:40 Propellant Production
26:25 Starlifting

ISRU: In-Situ Resource Utilization - From Regolith to Rocket Fuel

Stereo Edition
Five years ago, Paul & Eli went for a day trip out to Brighton, to say it didn’t go well may be a bit of an understatement. To celebrate their 10th Birthday, CheapShow is going back again to do it properly… Whatever that means! Paul is determined to truly soak up all the fun of the seaside by being as sober as a judge and Eli has a few ideas in mind for things to do that are all truly awful. What begins as an aimless adventure soon turns into a glorious day out involving swarming seagulls, classic ghost trains, painful beach walking, mini electric train trips, elephant tunnels, “long eggs” and annoying tourists. Will Eli find his seafood snacks? Will Paul stay sober throughout the day? How long can Paul and Eli stay on good terms as the day drags on? Find out in this 3 hour epic walkabout romp!

See pics/videos for this episode on our website:
https://www.thecheapshow.co.uk/ep-442-another-day-trip-to-brighton

SEE US LIVE: Oct 18th @ The Cheerful Earful Podcast Festival 2.30pm, London
https://cheerfulearful.podlifeevents.com/festival/cheapshow---live-from-cheerful-earful-podcast-festival-18th-oct-2025-tickets

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https://youtube.com/live/Z18i8M3Eqac?feature=share

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Ep 442: Another Office Day Trip To Brighton (Stereo Edition)

02 快読快聴フィットネス

03 [Step1] We Didn't Know - Title Call

From Martians undone by germs to predators who insist on sporting duels, we explore the most ridiculous alien invasion tactics in fiction, and what they reveal about strategy, science, and human resilience.

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.
Visit our Website: http://www.isaacarthur.net
Join Nebula: https://go.nebula.tv/isaacarthur
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SFIA Discord Server: https://discord.gg/53GAShE
Credits:
The 10 Worst Alien Invasion Strategies
Episode 733; July 1, 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
0:48 10. The “Park and Wait” Strategy
2:02 9. Invading a Planet That Can Kill You
3:46 8. Single Point of Failure: The Hive or Control Ship
5:22 7. Telegraphing Your Arrival
6:50 6. Overly Convoluted Takeovers
8:30 5. Broadcasting Your Weakness
9:55 4. Playing Fair & Ritual Combat
11:54 3. Overconfidence & Underestimating the Locals
13:07 2. Hive Minds That Collapse Instantly
15:03 1. Ignoring the Home Field Advantage
16:06 Outro