Its ecological self-organisation showed us how it best adapted to the environment inside Biosphere 2
The Biosphere 2
story begins with an intentional community, Synergia Ranch, and its visionary leader, John Allen.
In 2003 Columbia decided to pull out, and Biosphere 2
has been kept open for paid public tours since then.
The sample from the Biosphere 2
ocean had the next lowest concentration (66 pg/L), indicating that high residence time of water over the reef community--in this case, eight years--does not necessarily create high concentrations of estrogen.
, so called because the Earth itself is considered Biosphere 1, offers tours and overnight stays to people interested in the high-tech nerve center of earth-science research and education.
A junior at Notre Dame in Indiana, Glynn was one of 50 college students who gathered at Biosphere 2
in the scenic Arizona desert to participate in Columbia University's "Earth Semester" an innovative four-and-a-half-month, 16-credit undergraduate program.
Originally conceived as a sealed laboratory for would-be explorers of Mars, Biosphere 2
fell into scientific disrepute when its eight original residents suffered from a lack of oxygen in their artificial atmosphere (see sidebar).
was supposed to be a self-sustaining world-within-a-world, a potential model for a colony in space (see SW 9/20/91, p.
The ecosystems of Biosphere 2
are varied and complex.
Small-scale rain forests, oceans, and marshes are being built inside Biosphere 2
, a 9100-square-meter steel, glass, and concrete structure in the Arizona desert under development by Space Biospheres Ventures (Oracle, Ariz.).
* On 26 September 1993, four women and four men smartly dressed in navy blue overalls, walked out through the airlock of Biosphere 2
to breath the planets natural air for the first time in two years.
Millions of people have heard about Biosphere 2
's problems, which led to the termination of human experiments in 1994.