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.

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

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.

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

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"

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

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.

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

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

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

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

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"

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

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.

Watch my exclusive video Mass Drivers on the Moon: https://nebula.tv/videos/isaacarthur-mass-drivers-on-the-moon-enabling-a-lunar-economy

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

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

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Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.

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

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

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

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.

Watch my exclusive video Mass Drivers on the Moon: https://nebula.tv/videos/isaacarthur-mass-drivers-on-the-moon-enabling-a-lunar-economy

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

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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Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.

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

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

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

Aliens don’t always attack with lasers—sometimes, the smartest invasions begin with a gift, a whisper, or a smile. Join us as we count down ten invasion strategies that actually make sense.

Join this channel to get access to perks:

https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join

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

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

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Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.

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

Credits:

The 10 Best Alien Invasion Strategies

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

1:20 10. The Infiltration Gambit: Invasion Without a War

3:58 9. False Prophets – The Alien Messiah Strategy

5:55 8. Weaponized Belief – Memes, Myths, and Messiahs

7:53 7. The Hybrid Convert Strategy

8:59 6. Shock and Awe: The Killing Star Approach

12:39 5. Divide and Conquer: Turning Humanity Into Its Own Worst Enemy

14:10 4. Trojan Tech: When the Upgrade Is the Invasion

17:40 3. Overwhelming Force and Organization

18:52 2. Preemptive Invasion & Interdiction for Conformity – The Galactic Empire Problem

20:32 Beyond Scorched Earth

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

Aliens don’t always attack with lasers—sometimes, the smartest invasions begin with a gift, a whisper, or a smile. Join us as we count down ten invasion strategies that actually make sense.

Join this channel to get access to perks:

https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join

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

Join Nebula: https://go.nebula.tv/isaacarthur

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

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Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.

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

Credits:

The 10 Best Alien Invasion Strategies

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

1:20 10. The Infiltration Gambit: Invasion Without a War

3:58 9. False Prophets – The Alien Messiah Strategy

5:55 8. Weaponized Belief – Memes, Myths, and Messiahs

7:53 7. The Hybrid Convert Strategy

8:59 6. Shock and Awe: The Killing Star Approach

12:39 5. Divide and Conquer: Turning Humanity Into Its Own Worst Enemy

14:10 4. Trojan Tech: When the Upgrade Is the Invasion

17:40 3. Overwhelming Force and Organization

18:52 2. Preemptive Invasion & Interdiction for Conformity – The Galactic Empire Problem

20:32 Beyond Scorched Earth

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

From metal scrolls buried under alien skies to frozen vaults holding minds or monarchs for millennia, we examine how advanced civilizations might safeguard their legacy against the slow grinding of eternity.

Watch my exclusive video Mass Drivers on the Moon: https://nebula.tv/videos/isaacarthur-mass-drivers-on-the-moon-enabling-a-lunar-economy

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

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: https://www.reddit.com/r/IsaacArthur/

Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.

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

Credits:

Vaults of Eternity - Planetary Archives & Stasis Fields - Extended Edition

Episode 741; July 27, 2025

Written, Narrated & Produced by: Isaac Arthur

Graphics:

Jeremy Jozwik

Sergio Botero

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

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

From metal scrolls buried under alien skies to frozen vaults holding minds or monarchs for millennia, we examine how advanced civilizations might safeguard their legacy against the slow grinding of eternity.

Watch my exclusive video Mass Drivers on the Moon: https://nebula.tv/videos/isaacarthur-mass-drivers-on-the-moon-enabling-a-lunar-economy

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

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: https://www.reddit.com/r/IsaacArthur/

Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.

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

Credits:

Vaults of Eternity - Planetary Archives & Stasis Fields - Extended Edition

Episode 741; July 27, 2025

Written, Narrated & Produced by: Isaac Arthur

Graphics:

Jeremy Jozwik

Sergio Botero

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

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