Science & Futurism with Isaac Arthur

What if alien civilizations exist—but chose to hide? Exploring shadow empires, cosmic silence, and the limits of secrecy in space.

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Credits:
Hidden Alien Empires: Shadow Civilizations & Exostellar Realms
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

What if alien civilizations exist—but chose to hide? Exploring shadow empires, cosmic silence, and the limits of secrecy in space.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Check out Mad Kings: https://nebula.tv/madkings?ref=isaacarthur
Watch my exclusive video Chronoengineering: https://nebula.tv/videos/isaacarthur-chronoengineering-manipulating-time-as-technology

🚀 Join this channel to get access to perks: https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join
🛒 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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🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur
💬 SFIA Discord Server: https://discord.gg/53GAShE

Credits:
Hidden Alien Empires: Shadow Civilizations & Exostellar Realms
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

How big could space habitats really get? From O’Neill cylinders to Ringworlds and Topopolises, we explore the true limits of megastructure scale.

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Watch my exclusive video Chronoengineering: https://nebula.tv/videos/isaacarthur-chronoengineering-manipulating-time-as-technology

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🛒 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:
How Big Could a Space Habitat Get?
Written, Produced & Narrated by:
Isaac Arthur
Editor: Tim Liusko
Graphics from Fishy Tree, Jarred Eagley, Jeremy Jozwik, J. Dixon, Ken York, Udo Schroeter
Music Courtesy of Chris Zabriskie & Stellardrone
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

How big could space habitats really get? From O’Neill cylinders to Ringworlds and Topopolises, we explore the true limits of megastructure scale.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Watch my exclusive video Chronoengineering: https://nebula.tv/videos/isaacarthur-chronoengineering-manipulating-time-as-technology

🚀 Join this channel to get access to perks: https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join
🛒 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:
How Big Could a Space Habitat Get?
Written, Produced & Narrated by:
Isaac Arthur
Editor: Tim Liusko
Graphics from Fishy Tree, Jarred Eagley, Jeremy Jozwik, J. Dixon, Ken York, Udo Schroeter
Music Courtesy of Chris Zabriskie & Stellardrone
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Are we here by design, chance, or selection bias? The Anthropic Principle, fine-tuning, doomsday math, and Boltzmann brains.

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Check out Joe Scott's Oldest & Newest: https://nebula.tv/videos/joescott-oldest-and-newest-places-on-earth?ref=isaacarthur
Watch my exclusive video Chronoengineering: https://nebula.tv/videos/isaacarthur-chronoengineering-manipulating-time-as-technology

🚀 Join this channel to get access to perks: https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join
🛒 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 Anthropic Principle – Are We Meant to Be Here, or Just Lucky?
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone & Chris Zabriskie
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.