## LEGO

[Designing a Lego orrery | Hacker News](https://news.ycombinator.com/item?id=40626807)
[Designing a Lego orrery | Marian's Blog](https://marian42.de/article/orrery/)

[How Lego builds a new Lego set | Hacker News](https://news.ycombinator.com/item?id=38653456)
[How Lego builds a new Lego set](https://www.theverge.com/c/23991049/lego-ideas-polaroid-onestep-behind-the-scenes-price)

[Every type of plastic used by LEGO (2022) | Hacker News](https://news.ycombinator.com/item?id=37444268)
[Every Type of Plastic Used By LEGO - BrickNerd - All things LEGO and the LEGO fan community](https://bricknerd.com/home/every-type-of-plastic-used-by-lego-5-20-22)

[Lego price per part over the years | Hacker News](https://news.ycombinator.com/item?id=39759693)
[LEGO price per part over the years - Brick Insights](https://brickinsights.com/statistics/ppp)

## bridges

[The Mystery of the Bloomfield Bridge | Hacker News](https://news.ycombinator.com/item?id=37359193)
[The Mystery of the Bloomfield Bridge](https://tylervigen.com/the-mystery-of-the-bloomfield-bridge)

## architecture and city planning

[Saint Michael Sword: Are the cathedrals really on a straight line? | Hacker News](https://news.ycombinator.com/item?id=40595499)

[Fern Hollow Bridge should have been closed years before it collapsed | Hacker News](https://news.ycombinator.com/item?id=40725214)
[This Bridge Should Have Been Closed Years Before It Collapsed — Practical Engineering](https://practical.engineering/blog/2024/6/18/this-bridge-should-have-been-closed-years-before-it-collapsed)

[Why Bridges Don't Sink | Hacker News](https://news.ycombinator.com/item?id=40861520)
[Why Bridges Don't Sink — Practical Engineering](https://practical.engineering/blog/2024/7/2/why-bridges-dont-sink)

[How French Drains Work | Hacker News](https://news.ycombinator.com/item?id=41176461)
[How French Drains Work — Practical Engineering](https://practical.engineering/blog/2024/8/6/how-french-drains-work)

[Roman Roads (2017) | Hacker News](https://news.ycombinator.com/item?id=40597216)
[Roman roads | Sasha Trubetskoy](https://sashamaps.net/docs/maps/roman-roads-original/)