Science & Futurism with Isaac Arthur cover image

The Megastructure Compendium

Science & Futurism with Isaac Arthur

00:00

The Hoop World

A hoop world is a doughnut shaped planet that classifies as a b w c because we can mega structure. A hydra shell is hollow like most shell boards, but lacks a black hole or neutron star in the centre. Hydro shells can be constructed to produce many thousands of times the normal marine living space as a planet with the same overall mass. See our episode mega structures hoop worlds for more details.

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