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In 1979, under towering cumulus clouds, two hikers in the Ojito Wilderness Area northwest of Albuquerque made a colossal find. Surrounded by pinion pines and ancient petroglyphs, four, huge, largely intact fossilized dinosaur tailbones were found partially exposed in a sandstone ledge. For the next twenty-five years the mystery of Seismosaurus unraveled.

June 29, 2005 | 25:32 | PRODUCER: Manual Machuca