Rocks as clocks reveal history
By Dr. Michael Shepard
Published: May 19, 2015
How old are you?” is a question whose answer depends heavily on context. Are you filling out an application for a driver’s license? Or indirectly scolding...
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Story Tags: 
Americas
North America
Greece
Bloomsburg University
nitrogen gas
Meteor Crater
Department of Environmental
Geographical
and Geological Sciences
and Geological Sciences at Bloomsburg University
Michael Shepard
driver
professor and chair

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