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Curious Planet is an original 10-page demonstration workbook, not a customer submission, vetted curriculum or endorsement by a linked organization.
The original live HTTP run began at 2026-11-01 16:36:28.866 UTC and finished at 16:36:53.071 UTC. The report and evidence are preserved from that run. Destinations may behave differently today, in another region or in a browser.
| Classification | Count |
|---|---|
| Confirmed broken | 4 |
| Materially redirected | 5 |
| Unverified | 11 |
| HTTP OK | 20 |
| Total | 40 |
Six URL paths were invented on real public domains to resemble stale links. They are not known historical resources: NASA (page 1), USGS (page 2), NCES (page 3), Library of Congress (page 5), Scratch (page 7) and The Met (page 8). Each is identified in the source manifest. Actual HTTP responses were used, without forcing the outcomes.
Three invented paths returned confirmed 404s; two were left unverified after their hosts restricted access. The invented USGS path returned HTTP success. This demonstrates why “HTTP OK” is not a guarantee of correct content. The ordinary micro:bit projects URL on page 10 also returned 404 twice in this run; it was not a seeded URL.
Of 40 URLs, 38 were requested. Two were not sent after a restriction on their hostname. Eleven unverified findings comprise eight HTTP 403 responses, one HTTP 429 response and two host pauses. None was labelled broken. No access restriction was bypassed.
This is an initial baseline: it makes no claim of newly broken or fixed links between runs. No browser rendering, login, OCR or semantic resource review was performed. Two failure attempts seconds apart are useful evidence, not proof that a resource has permanently disappeared.
Evidence: CSV report · recorded requests and state · URL/page manifest · original provenance notes.
PDF SHA-256: 121601bf65603bb96b8b91255eb66f6f5984ec0928989bc8f8b30ca0de676572