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Orbital Farms

As humanity expands into space, we’ll need new ways to grow food. Explore how orbital farms could sustain billions—on Earth, Mars, and beyond.

Checkout Scav: https://go.nebula.tv/scav?ref=isaacar… Watch my exclusive video Autonomous Space Industry: https://nebula.tv/videos/isaacarthur–… 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… Visit our Website: http://www.isaacarthur.net Join Nebula: https://go.nebula.tv/isaacarthur Support us on Patreon: / isaacarthur Support us on Subscribestar: https://www.subscribestar.com/isaac-a… Facebook Group: / 1,583,992,725,237,264 Reddit: / isaacarthur Twitter: / isaac_a_arthur on Twitter and RT our future content. SFIA Discord Server: / discord Credits: Orbital Farms — Extended Edition Episode 471a; November 1, 2024 Produced, Narrated & Written: Isaac Arthur Graphics: Jarred Eagley Jeremy Jozwik Katie Byrne Ken York YD Visual Udo Schroeter Select imagery/video supplied by Getty Images Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.
Watch my exclusive video Autonomous Space Industry: https://nebula.tv/videos/isaacarthur–…
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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…

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Credits:
Orbital Farms — Extended Edition.
Episode 471a; November 1, 2024
Produced, Narrated & Written: Isaac Arthur.
Graphics:
Jarred Eagley.
Jeremy Jozwik.
Katie Byrne.
Ken York YD Visual.
Udo Schroeter.
Select imagery/video supplied by Getty Images.
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

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Feed Your Curiosity with Curiosity Box, use code ‘isaac25’ to get 25% off

From abiogenesis to AI, we rank the top Great Filter candidates and test them against the data to see which best explains the Fermi Paradox. Is the universe empty, or just dangerous? We explore ten filters—cosmic, biological, and civilizational—that could silence civilizations before they spread.

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. Credits:
Could We Accidentally Destroy the Universe?
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.

Chapters
0:00 Intro
5:08 #10 The Fine-Tuned Universe & Rare Earth
12:55 #9 Abiogenesis (The Origin of Life)
16:29 #8 Complex Cells & Eukaryotes
20:14 #7 Multicellularity and Specialization
22:39 #6 Sexual Reproduction & Genetic Innovation
23:54 #5 Complex Animal Life
25:24 Curiosity
26:39 #4 Extended Childhood & Cooperative Rearing
29:17 #3 Long-Term Climate Stability
31:40 #2 Intelligence That Produces Technology
35:11 #1 The Late Filters: Surviving Technology, Ourselves, and Expanding Beyond the Home System.

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Orbital Arcologies: Mega-Cities in Space

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–… 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=isa… 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: / isaacarthur Support us on Subscribestar: https://www.subscribestar.com/isaac-a… Facebook Group: / 1,583,992,725,237,264 Reddit: / isaacarthur Twitter: / isaac_a_arthur on Twitter and RT our future content. SFIA Discord Server: / discord 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 Chapters 0:00 Intro — The Conductor’s Tale 4:43 Why Megacities in Space? 6:02 The Four Foundational Assumptions of Space Habitat Design 10:11 Flawed Assumptions & Specialized Habitats 11:28 The Urban Web – Tethered Transit and Megacity Growth 17:14 Nebula 18:24 Spiral Habitats – A Rolled-Up City in Space 20:19 Density and Design – Population Scaling 23:17 Green Limits – CO₂, Heat, and Living Space 26:08 The Future of Orbital Urbanization – Terran Swarms and Beyond.
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=isa…
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.
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SFIA Discord Server: / discord.
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.

Chapters.
0:00 Intro — The Conductor’s Tale.
4:43 Why Megacities in Space?
6:02 The Four Foundational Assumptions of Space Habitat Design.
10:11 Flawed Assumptions & Specialized Habitats.
11:28 The Urban Web – Tethered Transit and Megacity Growth.
17:14 Nebula.
18:24 Spiral Habitats – A Rolled-Up City in Space.
20:19 Density and Design – Population Scaling.
23:17 Green Limits – CO₂, Heat, and Living Space.
26:08 The Future of Orbital Urbanization – Terran Swarms and Beyond.

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Caretaker AI & Genius Loci: When Worlds Grow Minds of Their Own

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

Checkout Rifftrax https://go.nebula.tv/rifftrax?ref=isa… Watch my exclusive video The Fermi Paradox — Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur–… 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… Visit our Website: http://www.isaacarthur.net Join Nebula: https://go.nebula.tv/isaacarthur Support us on Patreon: / isaacarthur Support us on Subscribestar: https://www.subscribestar.com/isaac-a… Facebook Group: / 1,583,992,725,237,264 Reddit: / isaacarthur Twitter: / isaac_a_arthur on Twitter and RT our future content. SFIA Discord Server: / discord 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.
Watch my exclusive video The Fermi Paradox — Civilization Extinction Cycles: https://nebula.tv/videos/isaacarthur–…
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…

Visit our Website: http://www.isaacarthur.net.
Join Nebula: https://go.nebula.tv/isaacarthur.
Support us on Patreon: / isaacarthur.
Support us on Subscribestar: https://www.subscribestar.com/isaac-a…
Facebook Group: / 1583992725237264
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Twitter: / isaac_a_arthur on Twitter and RT our future content.
SFIA Discord Server: / discord.
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

Joscha Bach delivers “The Machine Consciousness Hypothesis” at Future Day 2026

Can AI become conscious?

What is consciousness for? And is biological consciousness best understood as a self-organising algorithm that could, in principle, be recreated in machines?

In this talk, Joscha explores consciousness as perception of perception, coherence maintenance, modelling, resonance, self-organisation, and the possibility that machine consciousness may emerge through the right virtual architecture.

Essay: ‘The Machine Consciousness Hypothesis’ by Joscha Bach & Hikari Sorenson: https://cimc.ai/cimcHypothesis.pdf

CIMC: https://cimc.ai

Post: https://scifuture.org/joscha-bach-the… Intro

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Cosmic Megafauna — Could Giant Alien Life Forms Exist?

Space is big—but could life out there be even bigger? Join us as we ask just how enormous alien life can get—and what it might look like.

Watch my exclusive video Fishbowl Starships — Water As Shielding — https://nebula.tv/videos/isaacarthur–…
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Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isa…
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.
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Twitter: / isaac_a_arthur on Twitter and RT our future content.
SFIA Discord Server: / discord.
Credits:
Cosmic Megafauna — Could Giant Alien Life Forms Exist?
Episode 727; June 26, 2025
Written, Produced & Narrated by: Isaac Arthur.
Select imagery/video supplied by Getty Images.
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.
Stellardrone, \

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Solar System Colonization Strategies

Whether its pioneering spirit and an urge to explore or a chance to make a fortune or new life out in space, colonization of our solar system may pursue many strategies across many new worlds.

Start Forging New Worlds: https://www.worldanvil.com/isaac-arthur.
Join this channel to get access to perks:
/ @isaacarthursfia.
Visit our Website: http://www.isaacarthur.net.
Join Nebula: https://go.nebula.tv/isaacarthur.
Support us on Patreon: / isaacarthur.
Support us on Subscribestar: https://www.subscribestar.com/isaac-a… Group: / 1,583,992,725,237,264 Reddit: / isaacarthur Twitter: / isaac_a_arthur on Twitter and RT our future content. SFIA Discord Server: / discord Credits: Solar System Colonization Strategies Science & Futurism with Isaac Arthur Episode 316, November 11, 2021 Written, Produced & Narrated by Isaac Arthur Editors: A.T. Long Keith Blockus Sig’unnr Cover Art: Jakub Grygier https://www.artstation.com/jakub_grygier Graphics: Fishy Tree https://www.deviantart.com/fishytree/ Jarred Eagley Jeremy Jozwik https://www.artstation.com/zeuxis_of_… Katie Byrne Ken York / ydvisual Kris Holland of www.maficstudios.com Sam McNAmara Sergio Botero https://www.artstation.com/sboterod?f… Space Engine Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.
Facebook Group: / 1583992725237264
Reddit: / isaacarthur.
Twitter: / isaac_a_arthur on Twitter and RT our future content.
SFIA Discord Server: / discord.

Credits:
Solar System Colonization Strategies.
Science & Futurism with Isaac Arthur.
Episode 316, November 11, 2021
Written, Produced & Narrated by Isaac Arthur.

Editors:
A.T. Long.
Keith Blockus.
Sig’unnr.

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier.

Graphics:

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