What Actually Expands In An Expanding Universe?

As the universe expands, #expanding #space is said to “stretch” photons. But if it stretches photons, does it also stretch molecules, galaxies and you? A portion of this video was sponsored by Salesforce. Go to to learn more.

Special thanks to Geraint Lewis – this video was based on his paper “On the relativity of redshifts”
Check out his YouTube channel: and books:

Expanding Space: the Root of all Evil?
Matthew J. Francis, Luke A. Barnes, J. Berian James, Geraint F. Lewis

Editing and VFX by Trenton Oliver
Thumbnail by Ignat Berbeci

Music from

#SMB #smallbiz #startups #SalesforceEssentials

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