Could you build a relativistic bullet? In theory, yes. In practice, the acceleration, power demand, and atmospheric effects are so absurd that your “bullet” becomes exotic gravel long before it becomes a useful weapon. A one-kilogram slug at 10% light speed carries...
Where should humanity build its first Moon base: Shackleton Crater, lava tubes, lunar maria, or the far side? The Moon’s future may be a network, not one base. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my...
First contact is easy. Living together isn’t. How would humanity merge with alien civilizations in a shared galaxy of trade, politics, and uneasy peace? Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my exclusive...
Are habitable planets rare cosmic jewels, or scattered across the galaxy by the billions? We explore what “habitable” really means, from Earthlike worlds to planets we might someday transform. 🚀 Join this channel to get access to perks:...
Antimatter propulsion could be the fastest engine ever built. We explore how antimatter rockets work, their extreme energy density, and whether they could power humanity’s first true interstellar spacecraft. Get Nebula using my link for 50% off an annual subscription:...
Before NASA, we had a plan for a rotating space station. The Von Braun Wheel could be humanity’s first step toward artificial gravity, orbital habitats, and permanent life beyond Earth. Get Nebula using my link for 50% off an annual subscription:...
Are aliens watching us? The Zoo Hypothesis suggests advanced civilizations may be hiding, enforcing a galactic quarantine, or masking reality itself. Explore the Fermi Paradox, Dyson dilemma, and the unsettling possibility we are not alone—but observed. Get Nebula...
Artificial intelligence is changing the world, but not quite the way headlines suggest. Here’s a calmer look at AI’s risks, limits, and real potential. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my exclusive...
In space, everything is a weapon. From orbits to infrastructure, here’s how the first real war between worlds might actually be fought. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my exclusive video Surviving a...
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...
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...
Interstellar dust is a real threat to starships, but is it a dealbreaker? We look at speed, impact energy, and clever shielding. 🚀 Join this channel to get access to perks: https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join 🛒 SFIA Merchandise:...