txt.sour.is @<xkcd-com https://feeds.twtxt.net/xkcd-com/twtxt.txt> "**Physical Quantities** The Hubble length is about 1.9 meters lying down; Edwin Hubble was a tall guy. ⌘ Read more"

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Tue, May 23 18:00 2023 (1y ago)

Physical Quantities

The Hubble length is about 1.9 meters lying down; Edwin Hubble was a tall guy.

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