Shewanella on Hematite

3000x magnification of Shewanella oneidensis MR-1 on hematite.

A Grand Challenge in biogeochemistry, led by PNNL scientists Dr. John Zachara and Dr. Jim Fredrickson is studying how organisms exchange energy and electron flux with mineral matter in soils, sediments, and subsurface materials.

Learn more: www.emsl.pnl.gov/root/science/biogeochemistry/