Dyson tree

A Dyson tree is 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.

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A Dyson tree would consist of a few main trunk structures growing out from a comet nucleus, flowering into branches and leaves that intertwine, forming a spherical structure possibly dozens of kilometers across.

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