Episode

Space-Time Expansion, Explained | Adam Riess

Podcast: NOVA Presents
Published: Mar 4, 2026
Duration seconds: 101
Processing state: not_requested
Canonical source: https://play.prx.org/listen?ge=prx_322_a4a6fd08-0a00-450b-8a95-790987d31613&uf=https%3A%2F%2Ffeeds.wgbh.org%2F322%2Ffeed-rss.xml
Audio: https://dts.podtrac.com/redirect.mp3/tracking.swap.fm/track/sblTq32fyWAjsHzze2LG/dovetail.prxu.org/_/322/a4a6fd08-0a00-450b-8a95-790987d31613/How_is_Spacetime_Expanding_Adam_Riess_AUDIO_01.mp3
JSON: /v1/public/podcasts/nova-presents-1297629/episodes/space-time-expansion-explained-adam-riess
Markdown: /podcast/nova-presents-1297629/space-time-expansion-explained-adam-riess.md

Actions

POST https://stenobird.com/v1/public/podcasts/nova-presents-1297629/episodes/space-time-expansion-explained-adam-riess/transcription-requests
Idempotently request low-priority transcript generation for this episode.
GET https://stenobird.com/podcast/nova-presents-1297629/space-time-expansion-explained-adam-riess.md
Read the agent-friendly Markdown representation of this episode resource.

Summary

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. For more, check out the extended interview with Adam Riess. Learn more about NOVA and subscribe to our YouTube channel.