txt.sour.is @<xkcd-com https://feeds.twtxt.net/xkcd-com/twtxt.txt> "**Light Leap Years** When Pope Gregory XIII briefly shortened the light-year in 1582, it led to navigational chaos and the loss of several Papal ..."

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Tue, Feb 20 17:00 (39w ago)

Light Leap Years

When Pope Gregory XIII briefly shortened the light-year in 1582, it led to navigational chaos and the loss of several Papal starships.

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