The Why Files Staff:

Megan Anderson
project assistant

Terry Devitt
editor

S.V. Medaris
designer/ illustrator

Darrell Schulte
webmaster

David Tenenbaum
feature writer

Amy Toburen
content development
executive

Credits

* Virginia Dale
Environmental Sciences Division
Oak Ridge National Laboratory

Dan Dzurisin
Volcanologist
Cascades Volcano Observatory

* Steve Malone
Director
Pacific Northwest Seismograph Network at the University of Washington

* Roland Mundil
Berkeley Geochronology Center

* denotes fact-checker

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