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A hypothetical genetically-engineered plant, (perhaps resembling a tree) capable of growing on a comet, suggested by the physicist Freeman Dyson. He suggested that such plants could produce a breathable atmosphere within hollow spaces in the comet (or even within the plants themselves) utilising solar energy and cometary materials, thus providing self-sustaining habitats for humanity in the outer solar system. Freeman Dyson at Harvard University in 2004 Freeman John Dyson (born December 15, 1923) is an English-born American physicist and mathematician, famous for his work on nuclear weapons design and policy, and for his futurism viewpoints and science fiction concepts. ...
A Dysontree is a hypothetical genetically-engineered plant, (perhaps resembling a tree) capable of growing on a comet, suggested by the physicist Freeman Dyson.
Dysontrees are mentioned a number of times in science fiction, beginning in the 1980s:
In the Orion's Arm shared universe (established 2000), dysontrees and dysontree "forests" are called orwoods; these have been established in a number of star systems throughout terragen space.
Freeman John Dyson (born December 15, 1923) is an English-born physicist and mathematician, famous for his work in quantum mechanics, nuclear weapons design and policy, and for his serious theorizing in futurism and science fiction concepts, including the search for extraterrestrial intelligence.
Dyson conceived that such structures would be clouds of asteroid-sized space habitats, though science fiction writers have preferred a solid structure: either way, such an artifact is often referred to as a Dyson sphere, although Dyson himself used the term "shell".
Dyson says (20 minutes into a video) that he used the word "artificial biosphere" in the article meaning a habitat, not a shape.
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