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url: https://www.smithsonianmag.com/smart-news/how-has-roman-concrete-lasted-for-millennia-a-1900-year-old-latrine-offers-new-clues-about-the-materials-impressive-durability-180989115/
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category: news/tech
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published_at: '2026-07-17T03:48:26Z'
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updated_at: '2026-07-17T16:22:03Z'
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title: How Has Roman Concrete Lasted for Millennia? 1,900-Year-Old Latrine Offers
  Clues
---

# How Has Roman Concrete Lasted for Millennia? 1,900-Year-Old Latrine Offers Clues

## TL;DR
（要約なし・原文はリンク先を参照 / No summary available; see the source link.）

## Key Points
- it_general / it_tech / it_ai

## Details
(本文なし。リンク先参照)

## Source
元記事: [How Has Roman Concrete Lasted for Millennia? 1,900-Year-Old Latrine Offers Clues](https://www.smithsonianmag.com/smart-news/how-has-roman-concrete-lasted-for-millennia-a-1900-year-old-latrine-offers-new-clues-about-the-materials-impressive-durability-180989115/) — published 2026-07-17T03:48:26Z