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VIDEO: Rock music

VIDEO: Rock music

What makes these boulders ring?

Some unusual boulder fields lay scattered across Pennsylvania and New Jersey. What’s special? The rocks ring like bells when struck with a hammer.

Despite the rocks’ popularity, the question of why they ring has been largely abandoned by scientists. The only rudimentary answers appear in an obscure publication in 1970 by a Rutgers researcher who barely left a digital trace. More…

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VIDEO: Rock music

VIDEO: Rock music

What makes these boulders ring?

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