What Are the Limits of Human Knowledge?

What Are the Limits of Human Knowledge?

Can humanity ever know everything? Explore the hard limits of knowledge: cosmic horizons, quantum measurement, chaos, computation, lost meaning, AI, wisdom, and the shoreline of the unknown. Get Nebula using my link for 50% off an annual subscription:...

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The End of Time: Heat Death, Big Rip, or Big Crunch?

The End of Time: Heat Death, Big Rip, or Big Crunch?

Will the universe fade, rip apart, collapse, reset, or simply stop making sense? A tour of the strangest possible endings of reality. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Check out Joe's Scott's Oldest and...

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The Most Dangerous Stars in the Universe

The Most Dangerous Stars in the Universe

The universe has stars that don’t just shine, they threaten worlds. Explore neutron stars, magnetars, pulsars, hypernovae, vampire stars, and gamma-ray bursts. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch the SFIA...

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The Dark Forest Has One Big Problem

The Dark Forest Has One Big Problem

The Dark Forest solution to the Fermi Paradox imagines the galaxy as a place where every civilization hides, afraid that making noise will bring hunters. But life itself is noisy. Long before radio, rockets, or cities, Earth was already advertising biology through...

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Digital Immortality – Backing Up the Human Soul

Digital Immortality – Backing Up the Human Soul

Could digital immortality really save you, or just create a convincing copy? We explore mind uploading, backups, identity, and whether survival means continuity… or redundancy. Get Nebula using my link for 50% off an annual subscription:...

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Is AI the Great Filter? | The Fermi Paradox

Is AI the Great Filter? | The Fermi Paradox

Artificial intelligence may be civilization’s greatest tool… or its last. Could AI explain why the galaxy seems silent, or does it make the Fermi Paradox even harder? Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch...

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Could We Reach Alpha Centauri in 20 Years?

Could We Reach Alpha Centauri in 20 Years?

Alpha Centauri is 4.37 light years away—so could we reach it in 20 years? Only by leaving ordinary rockets behind for beamed sails, antimatter, or stranger drives. 🚀 Join this channel to get access to perks:...

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Antimatter Containment – Bottling the Lightning

Antimatter Containment – Bottling the Lightning

Can antimatter be stored safely? Explore magnetic traps, starship fuel, and the terrifying challenge of bottling energy that destroys any container it touches. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my...

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What If We Found a Second Earth Nearby?

What If We Found a Second Earth Nearby?

What if we found a true second Earth nearby? A living world, a barren paradise, or something too familiar to be natural could change science, politics, and humanity’s future forever. Get Nebula using my link for 50% off an annual subscription:...

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