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2026-09-07 06:33:14 UTC

Greg Egan on Nostr: Alice flies along a path the size & shape of the Arctic Circle—but whose centre ...

Alice flies along a path the size & shape of the Arctic Circle—but whose centre lies *on* the Arctic Circle.

As she crosses the Arctic Circle on a bearing ~29° east of north, Bob crosses the Antarctic circle with the same bearing, on a path that’s identical except its centre is: