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How is Roman concrete still standing after 2k years?

https://www.livescience.com/archaeology/romans/how-is-roman-concrete-still-standing-after-2-000-years

1•Brajeshwar•6h ago

Comments

gnabgib•6h ago

Previously:

We Know Why Ancient Roman Concrete Lasts Thousands of Years (29 points, 4 days ago, 15 comments) https://news.ycombinator.com/item?id=44018319

Why was Roman concrete so durable? (627 points, 2023, 277 comments) https://news.ycombinator.com/item?id=34280239

Why Ancient Roman Concrete Outlasts Our Own (2017) (54 points, 2021, 67 comments) https://news.ycombinator.com/item?id=29366911

2050-year-old Roman tomb offers insights on ancient concrete resilience (163 points, 2021, 105 comments) https://news.ycombinator.com/item?id=28833525

How Ancient Rome’s Concrete Has Survived 2000 Years (2017) (190 points, 2019, 84 comments) https://news.ycombinator.com/item?id=20482050

Show HN: Aiden AI – An Executive Assistant App for Founders and Professionals

https://apps.apple.com/us/app/aiden-ai/id6745358011

1•kpappworx•48s ago•0 comments

Diseases are spreading. The CDC isn't warning the public like it was months ago

https://www.npr.org/2025/05/21/nx-s1-5387723/cdc-communications-cuts-social-media-public-health

2•bookofjoe•6m ago•0 comments

Nearly 50k emails leaked from org linked to Russian intelligence

https://www.occrp.org/en/project/dear-compatriots/russian-foundation-aimed-at-helping-compatriots-abroad-supports-spies-criminals-and-propagandists

1•obscurette•8m ago•0 comments

The Twopenny Hangover

https://mikedashhistory.com/2021/05/19/the-twopenny-hangover/

1•Jerry2•8m ago•0 comments

The Machine Stops (1909)

https://standardebooks.org/ebooks/e-m-forster/short-fiction/text/the-machine-stops

1•xeonmc•8m ago•0 comments

Google rejected giving publishers more choice to opt out of AI Search

https://www.theverge.com/news/671711/google-ai-overviews-search-publisher-data-choice

1•microflash•12m ago•0 comments

Death by a 1000 Standups

https://niyas.me/articles/standups

2•niazangels•15m ago•1 comments

Show HN: TripJam – Collaborative AI Travel Agent

https://tripjam.app

1•kenforthewin•16m ago•0 comments

Hacker who breached comms app used by Trump aide stole data from across US govt

https://www.yahoo.com/news/exclusive-hacker-breached-communications-app-100242693.html

2•rmason•16m ago•0 comments

Show HN: How to Use Mermaid Chart as an AI Diagram Generator for Developers

https://docs.mermaidchart.com/blog/posts/how-to-use-mermaid-chart-as-an-ai-diagram-generator

1•msfi•16m ago•0 comments

Scientists figure out how the brain forms emotional connections

https://arstechnica.com/science/2025/05/scientists-figure-out-how-the-brain-forms-emotional-connections/

1•pseudolus•17m ago•0 comments

My Tony Robbins Experience

https://idiallo.com/blog/a-tony-robbins-story

2•foxfired•17m ago•0 comments

UnitedHealth paid nursing homes to reduce hospital transfers

https://www.theguardian.com/us-news/2025/may/21/unitedhealth-nursing-homes-payments-hospital-transfers

2•Jimmc414•17m ago•1 comments

SysModeler AI – Instantly turn text, code, or voice into SysML models

https://sysmodeler.ai

1•mtbwaez•17m ago•1 comments

Marked decline in semicolons in English books, study suggests

https://www.theguardian.com/science/2025/may/18/marked-decline-semicolon-use-english-books-study-suggests

1•gnabgib•17m ago•0 comments

Coworker.ai launches agentic AI with company context, backed by $13M seed

https://finance.yahoo.com/news/coworker-ai-launches-first-ai-123100009.html

3•thesunsets•18m ago•0 comments

Remembering the ISP That David Bowie Ran for Eight Years

https://hackaday.com/2025/05/19/remembering-the-isp-that-david-bowie-ran-for-eight-years/

1•rmason•20m ago•0 comments

Baby Saved by First Single-Patient Gene-Editing Medicine

https://newsforkids.net/articles/2025/05/21/baby-saved-by-first-single-patient-gene-editing-medicine/

1•thunderbong•20m ago•0 comments

I made a code security auditor for all you dumb vibe coders – thank me later

https://github.com/anshulyadav1976/VulnViper

1•anshulyadav1976•20m ago•1 comments

Obsidian Markdown Editor launches version 1.9.0 with new file format

https://www.neowin.net/news/obsidian-190-launches-with-new-file-format-footnotes-view-plugin-and-more/

2•bundie•26m ago•0 comments

Verizon tries to get out of merger condition requiring it to unlock phones

https://arstechnica.com/tech-policy/2025/05/verizon-tries-to-get-out-of-merger-condition-requiring-it-to-unlock-phones/

2•coloneltcb•26m ago•0 comments

I built Zuzia.app to simplify server monitoring and task automation

https://zuzia.app/

1•gbukat•28m ago•1 comments

Mason: Scalable, Contiguous Sequencing for Building Consistent Services [pdf]

https://www.cs.princeton.edu/~wlloyd/papers/mason-jsys23.pdf

1•foota•33m ago•1 comments

Tesla's head of self-driving admits 'lagging a couple years' behind Waymo

https://electrek.co/2025/05/21/tesla-head-self-driving-admits-lagging-a-couple-years-behind-waymo/

7•NullHypothesist•33m ago•0 comments

Ask HN: What are you using to generate logos?

2•slow_turtle3•36m ago•0 comments

Google is baking Gemini AI into Chrome

https://www.pcworld.com/article/2788839/project-mariner-google-is-baking-gemini-ai-into-chrome.html

2•iio7•36m ago•0 comments

All Embedding Models Learn the Same Thing

https://twitter.com/jxmnop/status/1925224612872233081

1•MrBuddyCasino•41m ago•0 comments

An autostereogram ("Magic Eye") solver

https://huggingface.co/spaces/thearn/magiceye-solver

1•thearn4•42m ago•1 comments

Ask HN: Using LLMs for Better Design in Front End Development?

1•lukis_mx•43m ago•0 comments

Show HN: RepublishAI – WordPress AI Agents

https://republishai.com/

1•domid•44m ago•0 comments