The 26,000-year astronomical monument hidden in plain sight

rfr
Wed, 30 Jan 2019 04:54:29 +0000

Link URL: https://medium.com/the-long-now-foundation/the-26-000-year-astronomical-monument-hidden-in-plain-sight-9ec13c9d29b5

Comments URL: https://tildes.net/~space/a07/the_26_000_year_astronomical_monument_hidden_in_plain_sight

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