Science & Futurism with Isaac Arthur

Latest Episodes:

SETI Explained - How We Search for Alien Civilizations May 12, 2026

Show notes

Explore SETI’s history and modern methods—from radio and laser searches to Dyson spheres and technosignatures—and how we might detect alien civilizations across the galaxy.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Gods & Monsters:

https://nebula.tv/curiousarchive/gods-and-monsters?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

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💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

SETI Explained - How We Search for Alien Civilizations

Written, Produced & Narrated by: Isaac Arthur

Graphics from Ken York, Sergio Botero

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

0:50 Why SETI Is Harder Than It Sounds

2:50 The Birth of SETI

6:15 Why Radio SETI Made Sense—and Why It Didn’t Work

9:34 The Shift in Perspective

10:55 Laser SETI

13:52 Dysonian SETI

16:59 Signals, Artifacts, and Echoes

19:09 Recognition Is Harder Than Detection

21:30 Gods & Monsters

22:30 What SETI Looks Like Today

25:18 SETI as a Mirror, Not a Phone Call

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

SETI Explained - How We Search for Alien Civilizations (Narration Only) May 12, 2026

Show notes

Explore SETI’s history and modern methods—from radio and laser searches to Dyson spheres and technosignatures—and how we might detect alien civilizations across the galaxy.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Gods & Monsters:

https://nebula.tv/curiousarchive/gods-and-monsters?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

SETI Explained - How We Search for Alien Civilizations

Written, Produced & Narrated by: Isaac Arthur

Graphics from Ken York, Sergio Botero

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

0:50 Why SETI Is Harder Than It Sounds

2:50 The Birth of SETI

6:15 Why Radio SETI Made Sense—and Why It Didn’t Work

9:34 The Shift in Perspective

10:55 Laser SETI

13:52 Dysonian SETI

16:59 Signals, Artifacts, and Echoes

19:09 Recognition Is Harder Than Detection

21:30 Gods & Monsters

22:30 What SETI Looks Like Today

25:18 SETI as a Mirror, Not a Phone Call

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Nomadic Aliens – Cultures That Wander the Galaxy May 09, 2026

Show notes

What if the oldest aliens in the galaxy are not empires, but nomads? We explore wandering fleets, deep-time survival, and civilizations without a homeworld.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Gods & Monsters:

https://nebula.tv/curiousarchive/gods-and-monsters?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

Nomadic Aliens – Cultures That Wander the Galaxy

Written, Produced & Narrated by: Isaac Arthur

Music Courtesy of Chris Zabriskie & Stellardrone

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

2:44 The Ship Is the World

10:49 The Nomadic Group Is Not the Species

19:15 Accretion, Not Assimilation

25:53 When Nomads Stop, and When They Refuse To

28:32 Gods & Monsters

29:32 The Oldest Civilizations May Be the Ones Still Moving

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Nomadic Aliens – Cultures That Wander the Galaxy (Narration Only) May 09, 2026

Show notes

What if the oldest aliens in the galaxy are not empires, but nomads? We explore wandering fleets, deep-time survival, and civilizations without a homeworld.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Gods & Monsters:

https://nebula.tv/curiousarchive/gods-and-monsters?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

Nomadic Aliens – Cultures That Wander the Galaxy

Written, Produced & Narrated by: Isaac Arthur

Music Courtesy of Chris Zabriskie & Stellardrone

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

2:44 The Ship Is the World

10:49 The Nomadic Group Is Not the Species

19:15 Accretion, Not Assimilation

25:53 When Nomads Stop, and When They Refuse To

28:32 Gods & Monsters

29:32 The Oldest Civilizations May Be the Ones Still Moving

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

The Tokamak Problem: Can We Ever Make Fusion Practical? (Narration Only) May 07, 2026

Show notes

Can nuclear fusion ever be practical? We explore tokamaks, plasma confinement, energy balance, and the real engineering challenges behind building a working fusion reactor—and whether fusion power will ever scale.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Tech Altar: https://nebula.tv/techaltar?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits: The Tokamak Problem: Can We Ever Make Fusion Practical?

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

The Tokamak Problem: Can We Ever Make Fusion Practical? May 07, 2026

Show notes

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Tech Altar: https://nebula.tv/techaltar?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits: The Tokamak Problem: Can We Ever Make Fusion Practical?

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Genetic Bottlenecks – How Few People Can Start a World? Or Restart One? May 03, 2026

Show notes

When disaster leaves only a handful, can a civilization restart? We explore genetic bottlenecks, colony failure, and the limits of survival.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Practical Engineering: https://nebula.tv/practicalconstruction?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

Genetic Bottlenecks – How Few People Can Start a World? Or Restart One?

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

10:56 Restoration

19:26 Practical Engineering

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Genetic Bottlenecks – How Few People Can Start a World? Or Restart One? (Narration Only) May 03, 2026

Show notes

When disaster leaves only a handful, can a civilization restart? We explore genetic bottlenecks, colony failure, and the limits of survival.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age

Check out Practical Engineering: https://nebula.tv/practicalconstruction?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

Genetic Bottlenecks – How Few People Can Start a World? Or Restart One?

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

10:56 Restoration

19:26 Practical Engineering

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Fleet of the Void - Designing Warships for Deep Space (Narration Only) Apr 30, 2026

Show notes

How would real space war actually work? From stealth myths to fuel limits, explore the brutal physics shaping starships, tactics, and survival in deep space combat.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Settling Saturn's Rings: https://nebula.tv/videos/isaacarthur-settling-saturns-rings-exploring-the-origins-resources-and-future-habitats-of-a-halo-world

Check out The Anatomy of the Nokia 3310: https://nebula.tv/videos/realengineering-the-anatomy-of-the-nokia-3310/?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

Fleet of the Void - Designing Warships for Deep Space

Written, Produced & Narrated by: Isaac Arthur

Editor: Keith Oxenrider

Graphics: Darth Biomech, Fishy Tree, Jeremy Jozwik, Legiontech, Udo Schroeter

Music by Epidemic Sound: http://nebula.tv/epidemic Chris Zabriskie & Stellardrone

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

1:53 The Strategic Context – Fighting in the Infinite

4:40 Unpredictable Motion and Limited Fuel Workarounds

6:37 Why Not Use Robot Pilots and Just Dodge Forever?

8:00 The Tethered Fleet: A fuel saving trick

10:13 No Stealth in Space

16:34 Warship Design: Built for the Void, Not for Hollywood

21:31 Command and Crew: Flesh, Steel, and Silence

25:43 Real Engineering

26:43 Life Support

28:06 Tactics in the Deep

31:42 Philosophy of the Void

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Fleet of the Void - Designing Warships for Deep Space Apr 30, 2026

Show notes

How would real space war actually work? From stealth myths to fuel limits, explore the brutal physics shaping starships, tactics, and survival in deep space combat.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur

Watch my exclusive video Settling Saturn's Rings: https://nebula.tv/videos/isaacarthur-settling-saturns-rings-exploring-the-origins-resources-and-future-habitats-of-a-halo-world

Check out The Anatomy of the Nokia 3310: https://nebula.tv/videos/realengineering-the-anatomy-of-the-nokia-3310/?ref=isaacarthur

🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/

🌐 Visit our Website: http://www.isaacarthur.net

❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur

⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur

👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/

📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/

🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:

Fleet of the Void - Designing Warships for Deep Space

Written, Produced & Narrated by: Isaac Arthur