Peter J. Heaney

Peter J. Heaney has been a professor of geosciences at Penn State University since 1998, and in 2008 he served as president of the Mineralogical Society of America. His research interests include environmental mineralogy and the formation of gemstones.

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Recent Stories

A nation is defined by what it preserves.

The way they live, the food they eat, and the effect on us

A true but unlikely tale

Story and Photographs by William Rowan

Increasing day length on the early Earth boosted oxygen released by photosynthetic cyanobacteria.