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Science & Medicine

Space-Time Expansion, Explained Adam Riess

NOVA Now by GBH

Mar 4, 202601:41Science & Medicine

If the universe is expanding, why aren’t galaxies stretching apart? Cosmologist Adam Riess breaks down the physics behind cosmic expansion, the forces that resist it, and why dark energy dominates the vast spaces between...

About This Episode

Space-Time Expansion, Explained Adam Riess is an episode from NOVA Now by GBH. If the universe is expanding, why aren’t galaxies stretching apart? Cosmologist Adam Riess breaks down the physics behind cosmic expansion, the forces that resis...

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Published Mar 4, 2026, 01:41 long, audio available.

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