San Francisco sphere

Earliest known poster for Gigantic obsidian sphere.

The San Francisco sphere (gigantic obsidian sphere, etc.) is an unnatural feature of San Francisco Bay, known since at least 2022.

In the News

• 

  "All we have to sphere is sphere itself" is popular catch-phrase from the mid-1930s, widely but incorrectly attributed to Franklin D. Roosevelt.

Fiction cross-reference

• All we have to sphere is sphere itself
• Gnomon algorithm
• Gnomon Chronicles

Nonfiction cross-reference

• Gnomon Chronicles (nonfiction)

External links

• Post @ Twitter (22 February 2023)

• San Francisco Bay @ Wikipedia

• https://twitter.com/GnomonChronicl1/status/1628475612724707329

• https://twitter.com/GnomonChronicl1/status/1562537872023990273