Science & Futurism with Isaac Arthur

What if humanity’s future isn’t on Earth—or even other planets—but in colossal artificial worlds built in space? In this episode, we explore the O’Neill Cylinder, a visionary space habitat that could house millions, serve as interstellar arks, and transform the cosmos into a network of orbital civilizations. Join us as we dive into the design, potential, and profound societal implications of these Islands in the Sky.

From genetically engineered warriors to armored giants storming enemy ships, we explore the science and fiction of space marines—super-soldiers built to conquer the stars. Join us as we examine real-world technologies and speculative enhancements that might one day bring these legendary troops to life.

In a future of limitless resources, what challenges remain when scarcity fades but human desires endure? Join us as we explore the path to post-scarcity civilizations, where technology solves material needs—but purpose, meaning, and new challenges await.

If aliens invaded, how would humanity respond? From planetary defense and space warfare to unexpected diplomatic twists, we’ll explore the strategies, technologies, and scenarios that could decide our fate.

Are rogue machines lurking in the cosmos, quietly outlasting their creators? We explore the eerie possibility that ancient AI remnants, abandoned or self-replicating, could be hidden throughout the galaxy—watching, waiting, and perhaps even shaping the fate of civilizations.

Hydropower has long been one of the world's most reliable sources of renewable energy, but how will it adapt to the challenges of the 21st century? In this episode, we explore the cutting-edge innovations shaping the future of hydroelectric power—from modular micro-hydro systems and improved pumped storage to tidal, wave, and even deep sea hydroelectric solutions.

Crystals are not alive, yet they grow, form complex structures, and even conduct electricity. Could life emerge from crystals rather than carbon-based molecules?

Is there a hidden dimension beyond space and time, a cosmic shortcut that could let us defy the speed of light? From warp drives to wormholes, science fiction has long dreamed of hyperspace travel—but could it ever be real?

Could we survive on a world where even lifting a coffee cup is a struggle? Discover how high-gravity planets shape life, technology, and the future of space colonization. From immense super-Earths to black holes, we examine the worlds where gravity rules all.

When exile—not exploration—becomes the driving force behind space colonization, what kind of civilizations will emerge? In this episode, we explore the forces that might send humanity’s unwanted, rebellious, or idealistic factions into the void, and what fate awaits them among the stars.