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"This is one of the most amazing places I've ever been on this planet." This cave has been frozen since the last Ice Age--over 10,000 years ago. See what it looks like inside
NOVA l PBS. . "This is one of the most amazing places I've ever been on this planet." This cave has been frozen since the last Ice Age--over 10,000 years ago. See what it looks like inside (originally aired in 2020):
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