Secrets of the Underground - Season 1 Episode 5 -
Season 1, Episode 5 - Great Lakes Bermuda Triangle
Descending into a cave 30 feet beneath Texas in search of evidence of a mass extinction event; heading to Lake Michigan to investigate an unexplained, Bermuda Triangle-like phenomenon that has caused ships to disappear for centuries.
Please explain the problem in a few words.
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Max 255 characters.