June 23, 2026
Tonight's selection runs warm on persistence. A vi codebase quietly preserved since the seventies. A caching layer that has outlasted three generations of hype. A camera body from a century ago, still being adapted for new sensors. A mountain range people keep coming back to. Even the data piece is about something that won't go away. If yesterday's edition was about new fossils and old rockets, this one is about what stays.
1. Mapping in the Dark — with Sonar · Maps Mania http://googlemapsmania.blogspot.com/2026/06/mapping-in-dark-with-sonar.html
A small browser game that strips away every visual cue you usually rely on in a map and gives you one tool: a sweeping radar. You're left to feel out a city by echo. It's a cartographer's prank on the genre — most map games train you to read satellite imagery; this one trains you to read absence. Worth ten minutes if only to notice how much of your "spatial sense" is really pattern-matching on rooflines.
2. 5 Reasons You Must Backpack the Wind River Range · The Big Outside https://thebigoutside.com/5-reasons-you-must-backpack-the-wind-river-range
Michael Lanza on the Winds — the granite cathedral that keeps pulling experienced backpackers back. He's been to Jackass Pass at least four times. The piece is less a sales pitch than a working hiker's argument for why a range you've already seen can still be the most surprising thing on your calendar. If you've ever wondered whether the Cirque of the Towers lives up to the photographs, the short answer is yes, and Lanza tells you which approach earns it.
3. Fake Polymarket Winnings · FlowingData https://flowingdata.com/2026/06/23/fake-polymarket-winnings
The Wall Street Journal traced the short-video ecosystem of staged Polymarket payouts: people pretending to have won big on prediction markets, harvested for engagement and routed toward "join my signal channel" pitches. Yau's framing is the useful part — not the scam itself but the visual grammar that makes it work. A small, sharp piece on how easily a screenshot can be made to look like evidence.
4. The Triple Crowner Survey: General Information · The Trek https://thetrek.co/triple-crowner-survey-general-information
There are fewer than 800 recorded Triple Crowners — people who have walked the full AT, PCT, and CDT. The Trek surveyed a meaningful slice of them about demographics, sequencing, gear, recovery, and what they'd do differently. The first installment is the demographic baseline, and even that contains more genuine surprise than you'd expect about who actually completes all three. A rare quantitative look at a very small population.
5. In Praise of Memcached · jchri.st (via Hacker News) https://jchri.st/blog/in-praise-of-memcached
A long appreciation of one of the quietest workhorses on the internet — the caching layer that's been silently absorbing load since 2003 while flashier successors came and went. It's an essay about taste in infrastructure: why the right answer to a hard problem is often the boring tool that solved it twenty years ago and is still solving it. Read this if you've ever had to convince a younger engineer that "just put memcached in front of it" is not laziness.
6. The Coming Loop · lucumr.pocoo.org (via Hacker News) https://lucumr.pocoo.org/2026/6/23/the-coming-loop
Armin Ronacher on feedback dynamics — how the systems we build inevitably grow loops we did not design, and how to think about that as the work, not an accident of it. Ronacher writes with the kind of plainness that only comes from having shipped a lot of things. It's short. It will change how you look at the next architecture diagram you draw.
7. The Traditional Vi · ex-vi.sourceforge.net (via Hacker News) https://ex-vi.sourceforge.net
A preserved port of Bill Joy's original vi — the actual editor, not vim, not nvi, not a tribute. The project keeps the codebase compilable on modern systems so you can run, more or less, the editor people learned Unix on. What struck me here is how readable it still is. Half a century of editor wars and the original is sitting right there, perfectly legible, waiting.
8. The ObscuraFlex Now Lets Photographers Use a Ricoh GR On Vintage Large Format Cameras · PetaPixel https://petapixel.com/2026/06/22/the-obscuraflex-now-lets-photographers-use-a-ricoh-gr-on-vintage-large-format-cameras
A small workshop is now selling an adapter that turns a Ricoh GR into the digital back of a 4x5 view camera. It's the sort of thing that should not be possible and definitely should not be elegant — and yet. There's a lineage to this kind of work: people refusing to let a tool age out simply because the manufacturer stopped supporting it. The product is niche; the impulse is the story.