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This site is made for others to use: journalists covering the candidacy, teachers who want to bring Chacaltaya into a classroom, researchers who need a citable source and Wikipedians who want to improve an article. All texts are licensed CC BY-SA 4.0 — they can be reused with attribution.
For now, most of the pages listed here are in Spanish only and say so in their link. The press kit, the timeline, the ten milestones and the sections of the main menu are also available in English.
What anyone writing about this place needs: verified facts, primary documents and correct credits.
The site’s key facts in a copy-ready block, the short and long descriptions of the project, the most common mistakes to avoid, the available photographs with their mandatory credits, and a contact for interviews. It is designed to let you close a story in twenty minutes without factual errors.
Open the press kit →Decrees, agreements, letters, minutes, photographs and press clippings, each with a stable identifier, transcription, archival record and suggested citation. Searchable by free text and filterable by type, decade and status.
Enter the archive (in Spanish) → Latest news NewsWhat is happening in the candidacy project and at the Laboratory: progress on the nomination file, archival finds, publications and scientific activity.
See the news (in Spanish) → Reference Experiment recordsFourteen programmes with their period, institutions and status. BASJE and the Nagoya solar neutron telescope already have full records, with a collapsible technical sheet, results and key publications.
See the experiments (in Spanish) → Reference People recordsDirectors, founders and visitors of the Laboratory. Five complete records — Escobar, Saavedra, Aguirre, Yukawa and Powell — with chronology, facts and sources, and the list of directors from 1952 to 2011.
See the people (in Spanish) →Particle physics at 5,200 metres is not an easy story to tell. These pieces exist so that it can be told.
Which Bolivian institutions grew out of the Laboratory between 1956 and 1980, branch by branch, with the dates the sources allow us to fix and those they do not yet. It shows at a glance what a text takes a page to tell.
See the tree (in Spanish) → Journey The timelineSeventy events from 1939 to today, filterable by theme, in three languages. It is the best map of the site and the easiest starting point for a class or a talk.
Explore the timeline →Sheets for secondary-school and university teachers: what a cosmic ray is, why altitude matters, and how to tell the story of the pi meson without equations. To be produced. ⚠
Meson, muon, air shower, nuclear emulsion, libration point, TeV. Short, jargon-free definitions with Spanish and Portuguese equivalents, shown over the word in the body of the milestones. ⚠
The consolidated bibliography of the ten milestones, with DOIs where they exist, and the list of archival collections consulted. Today it is scattered at the foot of each milestone. ⚠
The campaign launch on 26 September 2026 and the preparations at the Laboratory: forty-nine photographs with their credits. The historical ones remain published within the milestones and records.
See the gallery (in Spanish) → Videos Video galleryFive campaign videos: the seven reasons for the candidacy, the pion and the nuclear force, the logo explained, the preparations and the launch ceremony. To watch online or download; their on-screen text is in Spanish.
See the videos (in Spanish) →Chacaltaya Cosmic Ray Laboratory, Instituto de Investigaciones Físicas, Universidad Mayor de San Andrés, La Paz. Title of the page consulted, with the URL and the date of access. Each milestone and each archive document also carries its own suggested citation at the foot.
If you are preparing a story, a class or a publication and need material that is not here, write to the project: much of the archive is not yet online, but it exists.
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