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A 20th‑century Coca‑Cola bottle wedged inside an ironclad cannon

A 20th‑century Coca‑Cola bottle wedged inside an ironclad cannon

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A Coca‑Cola bottle wedged in a Civil War ironclad cannon makes a diver's credibility an unresolved dare: how did it get there?

A 20th‑century Coca‑Cola bottle wedged inside an ironclad cannon

In this episode, we follow the claims and career of Robert Marx, the prolific diver who said he slipped a Coca‑Cola bottle into the USS Monitor's gun barrel and later reported controversial finds across the globe. What does a lifetime of dramatic discoveries and relentless self-promotion mean for the line between proof and performance?

Person: Robert Marx
Event: USS Monitor sinking
Date: December 31, 1862
Location: Cape Hatteras, North Carolina
Output: 5,000 dives and 59 books

- Marx claimed he put a 20th‑century glass Coca‑Cola bottle inside a Monitor cannon as a joke during dives decades after the wreck sank.
- The Monitor sank in a storm on December 31, 1862, and divers reached the wreck in the 1970s to survey corroded iron and encrusted cannon.
- Marx built authority through a long career: Marine Corps Diving School director, five thousand dives, television appearances, and testimony to international bodies.
- In 1982 in Guanabara Bay Marx reported Roman amphorae that Brazilian authorities authenticated but found sediment disturbances implying recent movement.
- The tension between verifiable finds and theatrical claims - the bottle, the amphorae, the perfectly timed crossings and media moments - is the recurring problem his record poses.

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