Science & Futurism with Isaac Arthur

Explore SETI’s history and modern methods—from radio and laser searches to Dyson spheres and technosignatures—and how we might detect alien civilizations across the galaxy.

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💬 SFIA Discord Server: https://discord.gg/53GAShE
Credits:
SETI Explained - How We Search for Alien Civilizations
Written, Produced & Narrated by: Isaac Arthur
Graphics from Ken York, Sergio Botero
Select imagery/video supplied by Getty Images

Chapters
0:00 Intro
0:50 Why SETI Is Harder Than It Sounds
2:50 The Birth of SETI
6:15 Why Radio SETI Made Sense—and Why It Didn’t Work
9:34 The Shift in Perspective
10:55 Laser SETI
13:52 Dysonian SETI
16:59 Signals, Artifacts, and Echoes
19:09 Recognition Is Harder Than Detection
21:30 Gods & Monsters
22:30 What SETI Looks Like Today
25:18 SETI as a Mirror, Not a Phone Call

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

Explore SETI’s history and modern methods—from radio and laser searches to Dyson spheres and technosignatures—and how we might detect alien civilizations across the galaxy.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age
Check out Gods & Monsters:
https://nebula.tv/curiousarchive/gods-and-monsters?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:
SETI Explained - How We Search for Alien Civilizations
Written, Produced & Narrated by: Isaac Arthur
Graphics from Ken York, Sergio Botero
Select imagery/video supplied by Getty Images

Chapters
0:00 Intro
0:50 Why SETI Is Harder Than It Sounds
2:50 The Birth of SETI
6:15 Why Radio SETI Made Sense—and Why It Didn’t Work
9:34 The Shift in Perspective
10:55 Laser SETI
13:52 Dysonian SETI
16:59 Signals, Artifacts, and Echoes
19:09 Recognition Is Harder Than Detection
21:30 Gods & Monsters
22:30 What SETI Looks Like Today
25:18 SETI as a Mirror, Not a Phone Call

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

What if the oldest aliens in the galaxy are not empires, but nomads? We explore wandering fleets, deep-time survival, and civilizations without a homeworld.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age
Check out Gods & Monsters:
https://nebula.tv/curiousarchive/gods-and-monsters?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:
Nomadic Aliens – Cultures That Wander the Galaxy
Written, Produced & Narrated by: Isaac Arthur
Music Courtesy of Chris Zabriskie & Stellardrone
Select imagery/video supplied by Getty Images

Chapters
0:00 Intro
2:44 The Ship Is the World
10:49 The Nomadic Group Is Not the Species
19:15 Accretion, Not Assimilation
25:53 When Nomads Stop, and When They Refuse To
28:32 Gods & Monsters
29:32 The Oldest Civilizations May Be the Ones Still Moving
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

What if the oldest aliens in the galaxy are not empires, but nomads? We explore wandering fleets, deep-time survival, and civilizations without a homeworld.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age
Check out Gods & Monsters:
https://nebula.tv/curiousarchive/gods-and-monsters?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:
Nomadic Aliens – Cultures That Wander the Galaxy
Written, Produced & Narrated by: Isaac Arthur
Music Courtesy of Chris Zabriskie & Stellardrone
Select imagery/video supplied by Getty Images

Chapters
0:00 Intro
2:44 The Ship Is the World
10:49 The Nomadic Group Is Not the Species
19:15 Accretion, Not Assimilation
25:53 When Nomads Stop, and When They Refuse To
28:32 Gods & Monsters
29:32 The Oldest Civilizations May Be the Ones Still Moving
See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Can nuclear fusion ever be practical? We explore tokamaks, plasma confinement, energy balance, and the real engineering challenges behind building a working fusion reactor—and whether fusion power will ever scale.

Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur
Watch my exclusive video Surviving a New Ice Age: https://nebula.tv/videos/isaacarthur-surviving-a-new-ice-age
Check out Tech Altar: https://nebula.tv/techaltar?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: The Tokamak Problem: Can We Ever Make Fusion Practical?
Written, Produced & Narrated by: Isaac Arthur
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.