Congratulations to Savannah Bryant and Amelia Nelson for successfully defending their master theses. Savannah’s thesis examines seasonal dynamics in reactive manganese exchange between river water and groundwater in a high-elevation river. After graduation, Savannah will continue her work for the USGS in Columbus. Amelia’s thesis examines linkages between river-groundwater interaction, riverbed chemistry, and microbial communities. Amelia is off to Colorado State to begin a PhD in geomicrobiology with Professor Mike Wilkins. Congratulations are also in order for Jonathan Bell, who defended his senior thesis with research distinction on natural fluoride contamination in Tanzania. Jonathan is embarking on a USGS internship in Tacoma. Kudos to all!