--- title: "phys.org llms.txt, graded: Agent Ready HTML" description: "The phys.org llms.txt parsed and graded B against the llmstxt.org structure: 5 sections, 17 links, 2.4 KB. Read 2026-11-04." canonical: https://agentreadyhtml.com/llms-txt-index/phys-org/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "llms.txt Index" --- # phys.org llms.txt, graded: Agent Ready HTML > The phys.org llms.txt parsed and graded B against the llmstxt.org structure: 5 sections, 17 links, 2.4 KB. Read 2026-11-04. Source: https://agentreadyhtml.com/llms-txt-index/phys-org/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # phys.org llms.txt In short phys.org serves a 2.4 KB llms.txt with 5 H2 sections and 17 links, graded B on the llmstxt.org structure (5 of 6 checks). It lacks same-site links. The home page does not link it, so an agent that does not guess paths will not find it. No llms-full.txt was found. Read 4 November 2026. **llms.txt** 2.4 KB, 37 lines ```markdown # Phys.org > Phys.org is a daily science and technology news portal covering physics, chemistry, biology, earth sciences, astronomy & space, and nanotechnology, published by Science X. Phys.org sources stories from staff-written features, peer-reviewed journals, licensed news-agency content, and editor-selected press releases from universities and research institutions, plus closely vetted preprint/conference findings. Articles go through fact-checking and at least two editors' independent review before publication. See Editorial Process below for full detail. ## Main Categories - [Physics](https://phys.org/physics-news/): General physics, condensed matter, quantum, optics - [Nanotechnology](https://phys.org/nanotech-news/): Nanomaterials, nanophysics, bio & medicine nanotech applications - [Chemistry](https://phys.org/chemistry-news/): Materials, polymers, analytical chemistry - [Earth Sciences](https://phys.org/earth-news/): Geology, environment, climate - [Astronomy & Space](https://phys.org/space-news/): Astrophysics, planetary science, space exploration - [Biology](https://phys.org/biology-news/): Ecology, plant science, cell biology - [Other Sciences](https://phys.org/science-news/): Social science, economics, archaeology ## Feeds - [Sitemap Index](https://phys.org/sitemap/indx/): Full machine-readable article index - [RSS Feeds](https://phys.org/rss-feed/): Per-category live feeds ## About - [About Phys.org](https://sciencex.com/help/about-physorg/) ## About Science X - [About Science X](https://sciencex.com/help/about-us/): Network overview, mission, history, and Live-rank ranking system - [Editorial Process](https://sciencex.com/help/editorial-process/): How stories are sourced, fact-checked, and selected […] staff features, peer-reviewed journals, licensed news-agency content, and vetted university press releases, double-reviewed by editors before publication - [Editorial Standards](https://sciencex.com/help/editorial-standards/): Content and conduct standards - [Editorial Team](https://sciencex.com/help/editorial-team/): Staff and contributing writers - [Correction Policy](https://sciencex.com/help/corrections/): How corrections are handled and reported ## Network Sites - [Medical Xpress](https://medicalxpress.com/): Medical research advances and health news - [Tech Xplore](https://techxplore.com/): Engineering, electronics, and technology advances ``` First 37 of 37 lines. 1 span shown as \[…\] because the words or characters in them are rejected by this site's own style rules; the live file has them. **Parse** graded B, 5 of 6 file: https://phys.org/llms.txt Phys.org Phys.org is a daily science and technology news portal covering physics, chemistry, biology, earth sciences, astronomy & space, and nanotechnology, published by Science X. 5 sections, 17 links, no Optional section. Ora's cached score: not scored (read 5 November 2026). ## The parse phys.org lists 17 links: 9 point at phys.org or a relative path, 8 point elsewhere. The hosts it links most: phys.org (9), sciencex.com (6), medicalxpress.com (1), techxplore.com (1). | H2 section | Links | | --- | --- | | Main Categories | 7 | | Feeds | 2 | | About | 1 | | About Science X | 5 | | Network Sites | 2 | ## Grade against the llmstxt.org structure The file passes 5 of 6 checks and fails 1: at least 80 percent of links point at the same site. The grade is the count of passed checks: six is A, five is B, four is C, three is D, fewer is F. It measures structure only. Whether any agent reads the file is a separate question, covered on the [llms.txt reference](https://agentreadyhtml.com/llms-txt/). | Check | Result | Detail | | --- | --- | --- | | Starts with an H1 naming the site or project | Pass | H1: Phys.org | | Has a blockquote summary under the H1 | Pass | Blockquote summary found. | | Has at least one H2 section that lists links | Pass | 5 H2 sections, 5 with links. | | At least 80 percent of links point at the same site | Fail | 9 of 17 links stay on phys.org (53 percent). | | Under 100 KB | Pass | 2417 bytes as served. | | Plain markdown, no HTML | Pass | No HTML document markers in the body. | ## Ora's cached score Not scored by Ora. GET ora.ai/api/score/phys.org answered 404 DOMAIN\_NOT\_SCANNED on 5 November 2026, so Ora holds no cached score for this domain. This site asked for a cached score only and never requested a scan. A scan by the site's owner would add one. ## Linking and the companion file The home page of phys.org does not link the file in its HTML. Ora's lab found (2026-10-19) that 86 percent of llms.txt fetches by agents arrived through a link, so an unlinked file is mostly a file nobody opens. No llms-full.txt was found at the same root. ## How it compares At 2.4 KB the file is larger than 12 percent of the 2,529 plain-text llms.txt files in this edition, and its 17 links put it ahead of 29 percent of them on link count. The home page declares no generator. Size bucket: 2 to 10 KB. Tranco rank 2,945. Category: Top 10,000, no category. Live file: [https://phys.org/llms.txt](https://phys.org/llms.txt). Read 4 November 2026. If the file has since changed or gone, the live URL is the authority; this page records what the crawl read on that date. - [All entries](https://agentreadyhtml.com/llms-txt-index/) - [Edition 2026-11-04](https://agentreadyhtml.com/llms-txt-index/2026-11-04/) - [See the home page as a plain fetch](https://agentreadyhtml.com/viewer/?url=https%3A%2F%2Fphys.org%2F) ## Sources 1. [phys.org llms.txt](https://phys.org/llms.txt) https://phys.org/llms.txt, read 4 November 2026 2. [llms.txt proposal (llmstxt.org)](https://llmstxt.org/) https://llmstxt.org/, read 4 November 2026 3. [Tranco list 746WX (crawl universe)](https://tranco-list.eu/list/746WX) https://tranco-list.eu/list/746WX, read 4 November 2026 4. [Ora: AgentReady launch post (the 86 percent finding)](https://ora.ai/blog/agentready-launch?utm_source=agentreadyhtml.com&utm_medium=referral&utm_campaign=entry) https://ora.ai/blog/agentready-launch, read 4 November 2026 5. [Ora llms.txt (GET /api/score/{domain} looks up a cached score)](https://ora.ai/llms.txt?utm_source=agentreadyhtml.com&utm_medium=referral&utm_campaign=entry) https://ora.ai/llms.txt, read 5 November 2026 Last reviewed 5 November 2026 Edition Crawl 2026-11-04 Ora reads 2026-11-05 Page updated 2026-11-05 Method How the viewer reads a page, how a file is graded and how a platform is scored: [the method page](https://agentreadyhtml.com/method/).