A solo builder mapped every US golf course, with scorecards and live weather, and fixes errors from the comments in real time.
What the article says
- A hobbyist built a free interactive map covering more than 18,000 US golf courses.
- It starts from OpenStreetMap and layers on scorecards, difficulty ratings, and whether a course is public or private.
- Each course page shows a short weather forecast and a button to flag anything wrong or missing.
- The builder says corrections from actual golfers have beaten paid commercial data sources.
- Canada and Mexico are next, then Europe and the rest of the world.
What HN is saying
- Readers spent much of the thread naming courses the map was missing, and the builder fixed several live in the comments.
- Several people asked for course outlines drawn as shapes, which would let the map estimate size and other stats automatically.
- The sharpest disagreement was about golf and land use. One commenter called courses an exclusive misuse of public land back home, while the builder noted most courses near him in Michigan are open to everyone.
- Someone asked about estimating water use from the data, and a reply argued the source of the water matters far more than the amount.
- Other requests included adding mini golf, driving ranges, and indoor simulator venues.
A guy built a tiny desk radar that tracks real planes overhead using a cheap microcontroller.
What the article says
- A small screen and a cheap ESP32 chip turn into a live radar for planes flying nearby.
- It pulls flight data from an online tracking service rather than picking up radio signals itself.
- The build took about fifteen minutes and a bit of soldering, using an existing 3D printed case.
- He then rewrote the software to show more useful info, like each flight's origin and destination, plus local weather and time.
- Setup now happens entirely through a web browser, including future software updates.
What HN is saying
- Commenters push back on calling it a radar at all, since it just displays data pulled from an existing flight tracking website rather than detecting planes itself.
- Several suggest radar display is the more honest name for what it does.
- One person points out decoding the actual aircraft signals directly on this chip is technically possible, though tricky, and it is not a raw processing power problem so much as a data transfer bottleneck.
- A lighter take says building something that actually broadcasts a radar signal would have been the truly impressive version.
A startup is building a blended wing plane that airlines are actually betting real money on.
What the article says
- JetZero is building an all wing passenger plane where the body and wings merge into one lifting shape, cutting drag and fuel burn.
- Alaska and United have both invested, with United's deal including an option to buy up to two hundred aircraft.
- The company raised a large Series B round and broke ground on a factory in Greensboro, North Carolina.
- It's opening an engineering office in Wichita and has signed early interest from Japan Airlines and Gulf Air.
- A demonstrator aircraft, built with Northrop Grumman's Scaled Composites, is aiming for first flight in 2027.
What HN is saying
- Commenters explain what a blended wing actually is, and point out it should mean noticeably better fuel efficiency.
- The biggest worry is passenger experience: no windows, big screens instead, and a design where banking makes you move up and down rather than roll, which some fear causes more motion sickness.
- Skeptics say the real obstacle isn't the aerodynamics but certification, airport gate compatibility, and evacuation rules, arguing that's why big manufacturers stick with tube and wing designs.
- One person who studied fluid dynamics says the design is genuinely superior but expects regulation to be the thing that kills it.
- A few compare it to past ambitious aviation flops, while others note it could find an easier path as a military refueling tanker before ever carrying passengers.
New DNA evidence shows human evolution has actually sped up over the last five thousand years, not stopped.
What the article says
- Harvard geneticist David Reich and his team analyzed ancient DNA from nearly six thousand people to track how genes changed over eighteen thousand years.
- They found evolution has not slowed down at all. It has picked up pace, with more selection pressure in the last five thousand years than in the five thousand before that.
- Almost five hundred genes show clear signs of natural selection, most tied to immunity as diseases like tuberculosis and multiple sclerosis rose and fell in different eras.
- Other traits shifted too. Male pattern baldness became much rarer over seven thousand years, and blood type B appeared and spread where it barely existed before.
- The team says these changes do not mean people today are healthier or smarter, since a gene's old function can differ from what it does now.
What HN is saying
- Commenters spend a lot of time arguing over what evolution even means, with one insisting genetic drift alone does not count and others pointing out the study is specifically about selection pressure, not drift.
- A popular thread argues falling birth rates are themselves a strong selective force, since any trait that makes people want fewer kids gets weeded out over time.
- Several readers push back on the framing itself, calling it a clickbait premise since barely anyone actually believed evolution had stopped.
- One sharp comment says the real news isn't that evolution continued, but that immune related genes swung wildly as plagues and urbanization killed huge portions of populations.
- A tangent breaks out about whether humans could ever evolve away from harming each other, with replies noting evolution only rewards reproduction, not niceness.
Anthropic just cut 80 percent of Claude Code's system prompt, betting new models need less babysitting, not more.
What the article says
- Anthropic says it stripped over 80 percent of Claude Code's system prompt for its newest models, with no drop in coding results.
- The old prompt was full of contradictions, like telling Claude to leave documentation in one breath and never add comments in the next.
- Newer models handle that mess better by reading the situation and using judgment instead of following rigid rules.
- Their advice going forward is to trim your own CLAUDE.md files and skills the same way, and lean on memory, artifacts and skills to carry context instead of cramming it all into instructions.
What HN is saying
- Plenty of commenters pushed back on the timing, saying Opus 5 has actually been making more careless mistakes and writing bloated, overly long output lately.
- A recurring complaint is that Claude's automatic memory pulls in irrelevant past context and makes decisions nobody asked for, so several people said turning it off improved results.
- One sharp take called this a move to shift control from editable CLAUDE.md files into Anthropic's own tooling, deepening lock in to their platform.
- Others compared Claude unfavorably to GPT and Codex, arguing those tools still follow explicit instructions more reliably while Claude increasingly does its own thing.