The Universe is vast, and even voyages to neighboring stars may decades under known science, so how far can humanity colonize out into our galaxy or beyond? Produced, Written & Narrated by: Isaac Arthur Music Courtesy of Epidemic Sound...
The Fermi Paradox: Fallen Empires
Go to https://brilliant.org/IsaacArthur/ to get a 30-day free trial + the first 200 people will get 20% off their annual subscription. The cosmos seem silent and empty of any great interstellar empires, but perhaps they once existed, and if so, what titanic ruins...
Bussard Ramjet Starship Drive
To travel between the stars requires vast amounts of fuel and energy, but as it turns out, the ocean of night in deep space is full of fuel, if you can collect it along the way. The Fishback ramjet revisited:...
The Last Planet
Go to https://buyraycon.com/isaacarthur for 15% off your order! Brought to you by Raycon. Eons from now the last stars will be born, living trillions of years before they too fade out, and in the gathering darkness will come the final sunset on the last planet. Visit...
Is Our Galaxy Going To Collide With Andromeda?
We often hear that our galaxy will collide with the Andromeda Galaxy, our nearest neighbor, but in reality this is just the biggest of many titanic galactic mergers to come. Intergalactic Voyages: https://youtu.be/6aBfLA_g3og Produced, Written & Narrated by: Isaac...
Will Humans In Space Be Taller?
Adapting to live in space or on strange, alien worlds may change us in many ways, but would we be taller if we lived in low gravity? Life On A Low Gravity Planet: https://youtu.be/CBLCNWpLFBg Zero Gravity Civilizations: https://youtu.be/BcJSz_q2bIk Produced, Written...
Astrochickens & Von Neumann Probes
To explore the trillions of worlds in our galaxy, we will need space probes far more sophisticated than any craft we've ever built, including the ability to build themselves. Self Replicating Spacecraft: https://youtube.com/shorts/rZMVn8iJRU8 Produced, Written &...
Ammonia-Based Lifeforms
Get a free bag of fresh coffee with any Trade subscription at https://www.drinktrade.com/isaacarthur Our search for extraterrestrial life assumes alien life based on water and carbon, but could there be biochemistries based on other substances? NSS Townhall...
Hegemonizing Swarms
A Hegemonizing Swarm is a hypothetical living weapon, or self-replicating machine, which seeks to turn every last available bit of matter into more of itself or a desired construct. Paperclip Maximizer: https://youtu.be/3mk7NVFz_88 Produced, Written & Narrated by:...
Aliens Beyond the Galactic Rim?
Worlds far from the Galactic Core are thought to be low in many important elements for life, but some new research calls that into doubt, indicating that the ancient old worlds of the galactic rim might harbor alien life. See our episode The Fermi Paradox: The...
Quasar Cannon
The Quasar Cannon is a hypothetical way of weaponizing Black Holes. Able to sterilize entire galaxies, it epitomizes the idea that if Brute Force isn't working, you're not using enough of it. To find out more about other megastructures, see the Megastructure...
Coexistence with Aliens
One day we may encounter intelligent aliens, but can we ever hope to understand their psychology and coexist with them if we do? Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my exclusive video on Space Freighters:...
