John Cleves Symmes
American army officer, academic and hollow-earth theorist (1779/1780–1829)
- Fame43.4
- Momentum0.0
- Wikipedia926
United StatesSummary
Updated 2026-06-25
Captain John Cleves Symmes Jr. was an American Army officer, trader, and lecturer. Symmes is best known for his 1818 variant of the Hollow Earth theory, which introduced the concept of openings to the inner world at the poles.
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Historical5.7
Source confidence35.0
Completeness70.0
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- John Cleves Symmes Jr.Low confidencewikipedia · en.wikipedia.org
- جون كليفز سيمز جونيورLow confidencewikipedia · arz.wikipedia.org
- John Cleves Symmes juniorLow confidencewikipedia · de.wikipedia.org
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