The most expensive part of space travel isn’t the fuel—it’s the cargo. Additive manufacturing isn’t a sci-fi magic trick; it’s the key to building shipyards and telescopes at scales rockets were never meant to handle. We aren't just launching ships anymore; we're moving the factory to the void.

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 Practical Engineering: https://nebula.tv/videos/realengineering-the-anatomy-of-the-nokia-3310/?ref=isaacarthur

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Credits:

Additive Manufacturing in Microgravity

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

2:10 Additive Manufacturing Is Not a Printer

8:04 The Physics of Printing in Freefall

12:23 Low Gravity, Regolith, and the “Messy Middle”

17:01 CT Scan

17:59 Printing at Scales Rockets Can’t Touch

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

The most expensive part of space travel isn’t the fuel—it’s the cargo. Additive manufacturing isn’t a sci-fi magic trick; it’s the key to building shipyards and telescopes at scales rockets were never meant to handle. We aren't just launching ships anymore; we're moving the factory to the void.

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 Practical Engineering: 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/

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

Credits:

Additive Manufacturing in Microgravity

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

2:10 Additive Manufacturing Is Not a Printer

8:04 The Physics of Printing in Freefall

12:23 Low Gravity, Regolith, and the “Messy Middle”

17:01 CT Scan

17:59 Printing at Scales Rockets Can’t Touch

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

Why does the galaxy seem silent? Maybe aliens aren’t rare—maybe humans are. We explore the strange mix of traits that turned one clever primate into a technological civilization, and whether our oddities might be the real Great Filter.

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 Quinn's Ideas https://nebula.tv/quinnsideas?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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🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur

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

Credits:

The Fermi Paradox: Human Uniqueness and Oddity

Written, Produced & Narrated by: Isaac Arthur

Music Courtesy of Chris Zabriskie & Stellardrone

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.

Why does the galaxy seem silent? Maybe aliens aren’t rare—maybe humans are. We explore the strange mix of traits that turned one clever primate into a technological civilization, and whether our oddities might be the real Great Filter.

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 Quinn's Ideas https://nebula.tv/quinnsideas?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

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

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

Credits:

The Fermi Paradox: Human Uniqueness and Oddity

Written, Produced & Narrated by: Isaac Arthur

Music Courtesy of Chris Zabriskie & Stellardrone

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.

Cosmic strings may be ultra-thin defects in spacetime—relic “cracks” from the early universe. How we’d detect them, what they mean for physics, and how aliens might exploit them.

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

🛒 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:

Cosmic Strings – Cracks in the Fabric of the Universe

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro - Cracks in the Fabric of the Universe

6:11 From Defects to Cosmic Strings

13:31 Civilizations and Cosmic Strings: Tools, Traps, and Temptations

19:43 Nebula

20:39 Cousins, Confusions, and What a Discovery Would Mean

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

Cosmic strings may be ultra-thin defects in spacetime—relic “cracks” from the early universe. How we’d detect them, what they mean for physics, and how aliens might exploit them.

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

🛒 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:

Cosmic Strings – Cracks in the Fabric of the Universe

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro - Cracks in the Fabric of the Universe

6:11 From Defects to Cosmic Strings

13:31 Civilizations and Cosmic Strings: Tools, Traps, and Temptations

19:43 Nebula

20:39 Cousins, Confusions, and What a Discovery Would Mean

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

Interstellar city-states may dominate future space travel, governing the laser highways that connect stars and shape galactic civilization.

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 Practical Engineering: 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

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

Credits:

Interstellar Banking - The Galactic Financial System

Produced & Narrated by: Isaac Arthur

Written & Edited by: Briana Brownell, Isaac Arthur, Merv Johnson II, Thomas Owens

Graphics from Jeremy Jozwik & Sergio Botero

Music Courtesy of Chris Zabriskie & Stellardrone

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

4:45 Foundations of Currency in Space

6:06 Commodity Money

8:47 Fiat Money

10:40 Crypto & Distributed Ledgers

12:09 Time Dilation, Distance, and the Death of Real-Time Banking

12:55 Interplanetary Banking

18:34 Interstellar Banking

19:50 Interstellar Banking (Light-Years Away)

22:56 Intergalactic & FTL Banking

25:09 Automation, AI, and Autonomous Banking

26:22 CT Scan

27:28 Cultural and Ethical Dimensions of Cosmic Wealth

28:45 The Economics of Forever

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

Interstellar city-states may dominate future space travel, governing the laser highways that connect stars and shape galactic civilization.

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 Practical Engineering: 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:

Interstellar Banking - The Galactic Financial System

Produced & Narrated by: Isaac Arthur

Written & Edited by: Briana Brownell, Isaac Arthur, Merv Johnson II, Thomas Owens

Graphics from Jeremy Jozwik & Sergio Botero

Music Courtesy of Chris Zabriskie & Stellardrone

Select imagery/video supplied by Getty Images

Chapters

0:00 Intro

4:45 Foundations of Currency in Space

6:06 Commodity Money

8:47 Fiat Money

10:40 Crypto & Distributed Ledgers

12:09 Time Dilation, Distance, and the Death of Real-Time Banking

12:55 Interplanetary Banking

18:34 Interstellar Banking

19:50 Interstellar Banking (Light-Years Away)

22:56 Intergalactic & FTL Banking

25:09 Automation, AI, and Autonomous Banking

26:22 CT Scan

27:28 Cultural and Ethical Dimensions of Cosmic Wealth

28:45 The Economics of Forever

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