What would happen in a Universe without Quantum Mechanics?

What would happen in a Universe without Quantum Mechanics? Welcome to Alas Lewis & Barnes, a "conversation" about the universe between two cosmologists. Always sciency, sometimes funny, never boring.

Geraint Lewis is a Professor of Astrophysics at the Sydney Institute for Astronomy, University of Sydney. Professor Lewis is an internationally recognised astrophysicist, and has published more than two hundred papers in a diverse range of fields, including gravitational lensing, galactic cannibalism, cosmology and large-scale structure.

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