In February 1964, Vincent Gaddis published "The Deadly Bermuda Triangle" in Argosy magazine. He picked three points on a map, drew the lines, and turned a pile of unrelated disappearances into a shape. People have been drawing triangles on maps ever since.
The shapes were drawn by writers. The case files are real. One of these is going to stay with you.
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CHAPTERS 00:01:51 - The Bennington Triangle 00:40:06 - The Alaska Triangle 01:19:48 - The Bermuda Triangle 01:50:09 - The Bridgewater Triangle