From O’Neill cylinders to spiral habitats, discover how humanity might build colossal, interconnected cities high above Earth.

Watch my exclusive video The Economics of Immortality: https://nebula.tv/videos/isaacarthur-the-economics-of-immortality
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:
Orbital Arcologies - Mega Cities in Space
Written, Produced & Narrated by: Isaac Arthur
Graphics: Bryan Versteeg, Jeremy Jozwik, Katie Byrne, Udo Schroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Orbital Arcologies: Mega-Cities in Space

Solar storms are inevitable; disaster isn’t. We explore the physics of flares and CMEs, historical extremes, and realistic defenses—detection, delay, and planetary-scale shielding—to weather the Sun’s worst days.

Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
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:
Solar Flares and Coronal Mass Ejections - Defending Earth from Our Own Star
Written, Produced & Narrated by: Isaac Arthur
Graphics:  Mafic Studios, Sergio Botero
Select imagery/video supplied by Getty Images 
Music Courtesy of Aerium, Stellardrone, Chris Zabriskie, and Epidemic Sound http://epidemicsound.com/creator

Solar Flares and Coronal Mass Ejections - Defending Earth from Our Own Star (Narration Only)

From supernova graveyards and magnetar death fields to alien quarantines and simulation boundaries, we map out the “haunted houses” of the Milky Way and ask: are we living in one?

Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
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.

Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall.com/

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:
The Fermi Paradox - Forbidden Zones
Written, Produced & Narrated by: Isaac Arthur
Editor: Thomas Owens
Graphics: Ken ?York, Sergio Botero, Udo Schroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Stellardrone and Epidemic Sound http://epidemicsound.com/creator

The Fermi Paradox - Forbidden Zones (Narration Only)

Meet the caretaker AIs: guardians of planets, habitats, and civilizations. What happens when machines become the spirit and soul of the worlds they protect?

Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
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.

Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall.com/

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:
Caretaker AI & Genus Loci 2025 Edition
Written, Produced & Narrated by: Isaac Arthur
Editors: Ludwig Luska 
Graphics:
Bryan Versteeg
Jeremy Jozwik
Ken York YD Visual
Kris Holland Mafic Studios
Select imagery/video supplied by Getty Images
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Caretaker AI & Genius Loci: When Worlds Grow Minds of Their Own (Narration Only)

From Asimov’s Foundation to Warhammer 40K and Twilight Imperium, science fiction is filled with collapsing empires. But could civilizational decline really explain why the Universe seems so empty?

Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
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.

Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall.com/

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:
Twilight Imperium - When Galactic Civilizations Ebb
Written, Produced & Narrated by: Isaac Arthur
Editor: Lukas Konecny
Select imagery/video supplied by Getty Images 
Music Courtesy of Stellardrone and Epidemic Sound http://epidemicsound.com/creator

Twilight Imperium - When Galactic Civilizations Ebb (Narration Only)

Twilight Imperium - When Galactic Civilizations Ebb

Forget little green men — the galaxy’s most likely aliens may be hives and swarms. From biology to starships, insectoid life could shape civilizations stranger than ours.
Go to https://PIAVPN.com/IsaacArthur to get 83% off from our sponsor Private Internet Access with 4 months free!

Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall.com/

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:
Insectoid Aliens - Hive Minds, Swarms, and Alien Evolution
Written, Produced & Narrated by: Isaac Arthur
Editor: Thomas Owens
Select imagery/video supplied by Getty Images 
Music Courtesy of Stllardrone & Epidemic Sound http://epidemicsound.com/creator

Insectoid Aliens - Hive Minds, Swarms, and Alien Evolution (Narration Only)

From lunar regolith to metal-rich asteroids, this episode examines how off-world resources could spark the largest economic boom in human history — and what the fuel, transport, and political math actually looks like.

Checkout Rifftrax https://go.nebula.tv/scav?ref=isaacarthur
Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur

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:
The Space Mining Boom - How Resources Will Shape the Future Economy
Written, Produced & Narrated by: Isaac Arthur
Editor: Keith Oxenrider
Graphics:  Udo Schroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Chris Zabriskie, Stellardrone & Epidemic Sound  http://epidemicsound.com/creator

The Space Mining Boom - How Resources Will Shape the Future Economy

From nuclear nightmares to reality-breaking weapons, we examine how science and fiction imagine the end of everything. What happens when weapons don’t just destroy worlds but unmake reality itself? Explore the science of apocalypse.

Checkout Scav: https://go.nebula.tv/scav?ref=isaacarthur
Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur

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:
Doomsday Devices & Ontological Weaponry 
Written, Produced & Narrated by: Isaac Arthur
Editor: Lukas Konecny
Select imagery/video supplied by Getty Images 
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone

Doomsday Devices & Ontological Weaponry (Narration Only)

Before we plant flags on alien worlds, we’ll build homes that can cross the void. This episode explores how humanity’s first interstellar colony might be born inside the ship itself.

Checkout Scav: https://go.nebula.tv/scav?ref=isaacarthur
Watch my exclusive video The Fermi Paradox - Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur-the-fermi-paradox-civilization-extinction-cycles
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur

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:
The First Interstellar Colony Humanity’s Leap Beyond Sol
Written, Produced & Narrated by: Isaac Arthur
Editor: Donagh Broderick & Ludwig Luska
Graphics: Bryan Versteeg, Jeremy Jozwik, Udo Schroeter
Select imagery/video supplied by Getty Images 
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone

The First Interstellar Colony Humanity’s Leap Beyond Sol (Narration Only)

Mars calls to us as the next world to conquer—but should we go yet? Explore the case for and against colonizing the Red Planet, from science to strategy to survival.

Checkout Scav: https://go.nebula.tv/scav?ref=isaacarthur
Watch my exclusive video Autonomous Space Industry: https://nebula.tv/videos/isaacarthur-autonomous-space-industry-when-ai-robots-run-the-economy
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur

Grab one of our new SFIA mugs and make your morning coffee a little more futuristic — available now on our Fourthwall store! https://isaac-arthur-shop.fourthwall.com/
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:
Why We Should Go To Mars... And Why We Shouldn't
Written, Produced & Narrated by: Isaac Arthur
Editor: Keith Oxenrider
Graphics: Jeremy Jozwik
Select imagery/video supplied by Getty Images 
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone

Orbital Arcologies: Mega-Cities in Space

Isaac Arthur

Related tracks