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A short voyage toward the center of the Earth

In September of 1992, Yellowstone National park permitted a team of scientists to lower a camera probe into the vent of Old Faithful in order to learn more about the geyser's behavior. This is their footage, narrated by James A. Westphal. View the full report, "In situ observations of Old Faithful Geyser: Geology, v. 25" at http://bit.ly/1p3GwFd (PDF document).

July 16, 2014 5:00 pm  • 

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