Biosphere II Test Module. Technicians put the finishing touches on the test module of Biosphere II Project. Wednesday, 29-year-old Abigail K. Alling will be sealed in the 20-foot high, 23-square-foot capsule for five days. The marine mammals specialist will be cut off from everything in the outside except for sunlight and communication links. The experiment paves the way for a more extensive phase of the Biosphere II Project wherein eight people will live in a 2.5 acre Biosphere living for 24 months.