BIOSPHERE 2
Site — Oracle, Arizona
Status: Operating · Access: Open to public
Dossier: https://haunthunt.com/place/biosphere-2-oracle-arizona/

The sealed world that failed—1991, still running.

A site in Oracle, Arizona, Biosphere 2 is filed here for what the record attaches to it. The sealed world that failed—1991, still running. HauntHunt files it with science and local folklore. The dossier holds 1 reported claim and 1 documented fact, with the verified spine filed separately from the lore. The site is open to visitors. Names, dates and reports are filed together here, so the record stays honest about which is which.

Biosphere 2 is the sealed world — the $200 million glass enclosure in the Arizona desert where eight people lived for two years from 1991-93, the Mars colony experiment where the oxygen ran out. It was the most lauded experiment of the '90s, then the most ridiculed, then the most useful.
The experiment was the dream — John Allen's vision of a closed ecosystem that could sustain humans on Mars, Ed Bass's money, the rainforest and the ocean and the farm under three acres of glass. The oxygen dropped to 14% — the concrete was eating it; the cockroaches and the morning glories took over; the crew split into factions.
The building is still there — the University of Arizona's research facility, the rainforest still growing against the glass, the ocean that's now a climate experiment. The file keeps the bubble: the 1991 sealing, the oxygen failure, and the building that's still the largest closed system ever built.
Biosphere 2 is the archive's experiment file — the sealed world, the two-year mission, and the glass building that's still running.

WHY THIS FILE MATTERS
Biosphere 2 is the archive's experiment file — the closed ecosystem, the oxygen crisis, and the building that's still the largest sealed world.
A bubble that ran out of air keeps its glass — the file's suggestion being that Biosphere 2's hold is the seal: the eight biospherians, the concrete that ate the oxygen, and the experiment that's still teaching.

FILED CLAIMS — 1 on record, reported not verified
· [Anecdotal] apparition: Reported a presence in the facility. The site in Oracle, Arizona gives the account a documented setting: real place, real history, unresolved reports. It's anecdotal evidence in the strictest sense — stories, repeated, unresolved. 'Biosphere 2' carries the account. The figure remains the site's most-repeated sighting.
  source: Biosphere 2 (https://en.wikipedia.org/wiki/Biosphere_2)

HISTORY — 1 documented facts
· [1991–1993] The 1991-93 experiment is documented. A documented history gives the file real substance; this entry is part of that spine. This belongs to the verified spine of the entry, the layer everything else is measured against. The record appears in 'Biosphere 2'. The detail belongs to the verified spine of the entry.

SOURCES — 1 cited
· Biosphere 2 — Wikipedia
  https://en.wikipedia.org/wiki/Biosphere_2

—
HauntHunt is a research archive. Claims are filed as reported — documented where sources exist, marked as folklore or unverified where they do not.
Methodology: https://haunthunt.com/methodology/ · Corrections: https://haunthunt.com/report/