Join Isaac Arthur for a live discussion on the future of humanity and the technologies that will get us there! 🌌 This month, we are diving deep into your questions on space megastructures, interstellar travel, and the long-term trajectory of our civilization. 🔭

Bring your questions live as we explore:

Space Megastructures 🏗️: The engineering and physics of O’Neill Cylinders and Dyson Swarms.

Colonization 🛸: Strategies for settling the solar system and beyond.

The Fermi Paradox 👽: Analyzing the silence of the cosmos and what it means for our future.

Technological Advancement 🤖: How AI and fusion power could reshape the 21st century.

📅 Stream Schedule: Tuesday, February 17, 2026, at 8:00 PM EST.

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When the Earth beneath you moves, it can feel like hell is breaking loose. Earthquakes can level cities and spark other disasters from tsunamis to volcanic eruptions. Discover the seismic forces behind some of the world’s most devastating earthquakes from California to Haiti to New Zealand. Follow scientists uncovering what geologic hotspots are responsible for shaking the planet’s crust. New technology could help us predict the next Big One and protect us from their deadly consequences.

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Perhaps the most calamitous of the effects of climate change is the melting permafrost and resulting rising sea levels. The Arctic ice is rapidly disappearing, forever. Already, some coastal areas are in danger of disappearing in the next 10 years. This episode tells the story of citizens most urgently affected by the melt in Alaska, faced with becoming climate refugees.

As the earth heats up, the land under our feet is compromised. A warmer earth can lead to a deadly domino effect: an increase in occurrence, frequency and intensity of sinkholes and landslides. More voluminous rainfall leads to massive mudslides and debris flows, wiping out entire communities. This episode tells the story of devastating events in California and British Columbia, Canada.

#extremeweather #climatechange #documentary

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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.

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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

It might be our second largest and grooviest-looking planet, but Saturn is also a mini-solarsystem with 60 moons (and those crazy rings). Get a closer look at one of the most photographed and studied celestial bodies in our neighbourhood.

With NASA’s Dawn mission exploring the asteroid Vesta and dwarf planet Ceres, floating space rocks are a hot topic. Discover what’s new in the sphere of asteroids.

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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.

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Credits: The Tokamak Problem: Can We Ever Make Fusion Practical?
Written, Produced & Narrated by: Isaac Arthur
Select imagery/video supplied by Getty Images

Chapters
0:00 Intro
4:00 Why Fusion Is So Appealing
8:36 What Fusion Actually Is (and Isn’t)
10:49 The Sun Is Hot… and Also a Terrible Reactor
13:59 Quantum Tunneling: Winning by Statistics, Not Strength
17:59 Holding the Fire: The Plasma Problem
22:30 What Tokamaks Actually Solved
25:10 The Tokamak Problem, Precisely Stated
27:28 ITER and the Limits of Scaling
29:44 Tech Altar
30:44 What About Other Approaches?

A rugged sky-high plain in the heart of Bolivia, the Andean Altiplano is a natural wonder full of creatures adapted to some of Earth’s most brutal habitats. Its surreal deserts, restless volcanoes, and vast seas have remained unchanged for millennia.

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Your home for exploring science and the cosmos 🪐

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