Essays

The part that surprised me is that the “map” was never really the map. The Marshallese stick charts that sit in museum cases now — palm ribs tied into graceful lattices, cowrie shells marking islands — look like artifacts from an alternate history of cartography. They invite the easy Western interpretation: here is a people who made nautical charts out of sticks. Charming. Ingenious. Primitive-looking, but fundamentally recognizable. Except the more interesting claim is stranger than that....

The Plant That Forgot The Fix The sentence that keeps bothering me is not dramatic. It is the opposite of dramatic. Maintenance adjusted. Monitor next shift. That is the kind of note that can pass through a plant without setting off any alarm. It sounds responsible. It says someone responded. It says the line was running again. It says the next crew should keep an eye on it. Nobody reading it would think the plant had failed....

Roman concrete was not lost. Roman concrete remains, embedded in the Pantheon’s dome and in thousands of bridges and aqueducts that have stood for two thousand years. Vitruvius wrote down the recipe in the first century BCE. The texts have been continuously available. The materials still exist. By any reasonable test, the information about Roman concrete has been with us the entire time. What was lost, for roughly 1,400 years, was the ability to make it....

Around 1177 BCE — give or take a generation — the eastern Mediterranean world ended. This is not hyperbole. Within roughly fifty years, every major palace center east of Egypt and west of Mesopotamia ceased to function. The Hittite empire, dominant in Anatolia for three centuries, vanished. Mycenaean Greece, with its administrative literacy and palace economies, collapsed and lost the alphabet for four hundred years. Ugarit, the cosmopolitan Syrian port, was destroyed and abandoned....

For about fifty years, the United States has run a system that the rest of the safety-critical world looks at, agrees is excellent, and quietly fails to copy. The Aviation Safety Reporting System, NASA-administered since 1976, is non-punitive: a pilot, controller, mechanic, or flight attendant can report a near-miss, a procedure violation, or an unsafe condition with the implicit guarantee that — except in cases of criminal intent or willful misconduct — the report will not be used as the basis for FAA enforcement....

In 2001, in the trough of the dotcom bust, a generation of telecom engineers had just finished laying down what may be the single largest infrastructure overbuild in modern American history. By the most widely cited industry estimates from the early 2000s — Telegeography, Tier1 Research, FCC reports of the period — somewhere upwards of eighty percent of the long-haul fiber installed during the 1998–2002 buildout had never been lit. Hyperscaler usage since roughly 2010 has consumed a meaningful chunk of it, but even now, by every credible reconstruction I can find, long-haul utilization across the US remains well below half....

Aristotle wrote about eels in Historia Animalium around 350 BCE. He observed that they had no testes, no ovaries, no obvious reproductive organs of any kind. He concluded — reasonably, given what he could see — that eels must arise spontaneously from mud. Specifically, from the entrails of the earth. This was wrong. Twenty-three hundred years later, we know it’s wrong. We also still cannot reliably explain, in much detail, how eels reproduce....

The most reliable error-reduction technique in industrial safety might also be the most visually undignified. It’s not a checklist. It’s not a new sensor. It’s not even a procedure in the modern sense. It’s pointing at things while saying out loud what you see. That’s the entire intervention. And as far as anyone has measured, it cuts operator errors by roughly 85 percent. What it looks like If you’ve ridden the Tokyo Metro, you’ve seen it....

The most counterintuitive finding in the entire expert-vs-model literature might be this: the emergency room doctor who outperforms the diagnostic algorithm isn’t processing more information than the model. She’s processing less. And that’s exactly why she’s right. Research question: Expert prediction failures are well-documented (Tetlock’s foxes vs hedgehogs), but are there specific domains where expert intuition consistently outperforms actuarial/statistical models — and if so, do those domains share structural features that would let you predict in advance whether to trust the expert or the model?...

Your Eyes Work Fine. It’s Your Memory That Speaks a Language. Here’s the thing that surprised me most: the entire “language rewires perception” story — one of cognitive science’s most photogenic findings — appears to have been built on a measurement error in color space. Not a fraud. Not a p-hacking scandal. Something more mundane and, honestly, more interesting: the Munsell color system, which researchers used for decades to select “equally spaced” color stimuli, lies about its own uniformity....