Paul Richards, Earth Institute at Columbia University (image)

The Earth Institute at Columbia University

Caption

Paul Richards, a seismologist at Lamont-Doherty Earth Observatory, discusses the greatly expanded capabilities of instruments able to detect clandestine nuclear tests.

Credit

Courtesy Comprehensive Test Ban Treaty Organization

Usage Restrictions

Use this image to link to the video on YouTube: http://www.youtube.com/watch?v=RpyF5T6W-Z0

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