Science Ch. - Secrets of the Underground Series 1 (2017) Part 6 Californias Hidden Doomsday

Secrets of the Underground Series 1

Rob Nelson, an ecologist by trade and an explorer by pastime, travels the country to investigate long-lost, subterranean phenomena

Part 6 Californias Hidden Doomsday

Rob Nelson heads to California to investigate a network for major fault lines that could set off an unprecedented mega-quake. Then, he explores a mysterious sinkhole that some believe is an endless pit to the center of the earth.

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