Slump in foreground. Two rock falls in the center of photo, behind Escuela Secundaria Asunción Rodríguez de Sala along road PR-127 in Guayanilla near the Río Guayanilla. Credit: Stephen Hughes

Posted on January 27, 2020 by Alka Tripathy-Lang, Ph.D.

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Alka Tripathy-Lang, Ph.D.

Alka Tripathy-Lang is a freelance science writer based in Chandler, Arizona, and holds a Ph.D. in geoscience.

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