Terms like Universe, Observable Universe, and Hubble Volume often get used interchangeably and explained in very technical terms, but simply put, what are they and how do they differ?
What is a ‘Hubble Volume’?
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Aliens Beyond the Galactic Rim?
Worlds far from the Galactic Core are thought to be low in many important elements for life, but some new research calls that into doubt, indicating that the ancient old worlds of the galactic rim might harbor alien life. See our episode The Fermi Paradox: The...