Sep 14, 2026 · 31 min · 10 segments
Man, this video took me a while to make. It just may be my most ambitious project yet. Hopefully I didn't miss anything too important. If I did or made a mistake, feel free to let me know!
In the early 1960s, particle physics had a problem that looked very similar to how chemistry did before the periodic table was created.
Physicists had spent three decades building bigger accelerators to smash particles together at higher and higher energies, expecting to find only a handful of truly fundamental building blocks of matter.
Instead, they kept finding more and more particles.
Protons and neutrons were among those found, sure, but add to that pions, kaons, lambdas, and so on.
Dozens of them manifested, each with its own mass, its own charge, and its own peculiar decay pattern.
By the time the count crept past a hundred, physicists had started calling it, half-jokingly, the particle zoo.
It was hard to believe nature's basic inventory was really this cluttered.
What if this zoo of fundamental particles wasn't fundamental at all? What if every one of these particles was actually built from a much smaller set of pieces arranged in different combinations? It was an elegant idea.
It organized the chaos into tidy, predictable patterns, but it came with a catch that would take physicists the better part of a decade to work through.
If these pieces were real physical particles and not just a trick to organize the mess, well, no one had yet seen any evidence to support that, not in any detector, not in any cloud chamber, and not in any prior observed cosmic ray.
Whatever was hiding inside the proton, if anything at all, had never once shown up on its own.
But in the mid-1960s, that was all about to change.
Read the full transcript.
Create an account to read the whole episode, search across every transcript, and follow the shows you care about.
In the early 1960s, particle physics had a problem that looked very similar to how chemistry did before the periodic table was created.
Physicists had spent three decades building bigger accelerators to smash particles together at higher and higher energies, expecting to find only a handful of truly fundamental building blocks of matter.
Instead, they kept finding more and more particles.
Protons and neutrons were among those found, sure, but add to that pions, kaons, lambdas, and so on.
Dozens of them manifested, each with its own mass, its own charge, and its own peculiar decay pattern.
By the time the count crept past a hundred, physicists had started calling it, half-jokingly, the particle zoo.
It was hard to believe nature's basic inventory was really this cluttered.
What if this zoo of fundamental particles wasn't fundamental at all? What if every one of these particles was actually built from a much smaller set of pieces arranged in different combinations? It was an elegant idea.
It organized the chaos into tidy, predictable patterns, but it came with a catch that would take physicists the better part of a decade to work through.
If these pieces were real physical particles and not just a trick to organize the mess, well, no one had yet seen any evidence to support that, not in any detector, not in any cloud chamber, and not in any prior observed cosmic ray.
Whatever was hiding inside the proton, if anything at all, had never once shown up on its own.
But in the mid-1960s, that was all about to change.