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You’ve never seen Isaac Arthur like this

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Isaac Arthur on Nebula

Conformal Cyclic Cosmology

Conformal Cyclic Cosmology is a theory by physicist Roger Penrose for how the Universe might undergo cycles of decay and expansion, resetting over aeons, and in this Nebula Exclusive we'll explain the theory and how it might be proved.

Planets vs Megastructures

A Nebula Exclusive examining the pros and cons of terraforming planets versus constructing immense space habitats and artificial worlds.
“Nebula is a place where creators can try out new ideas and formats, and a great way for audiences to support their favorite shows without middlemen.”
Isaac Arthur

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