When will there be a closed loop life support demonstration on Earth?

Question

Attempt at closed life support and no resupply with a person inside it. At least 90 days  intended duration, based on start date.

Basically Biosphere, but could be more about spacecraft life support analogs -- farming not required.

Manifold Markets · Answer

Per Manifold Markets prediction market, Before 2035, followed by Before 2030 and Before 2028 are most likely. See the market for live updates (3 traders, as of Jun 14, 2026).

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