Microplastics Sample under a Microscope (IMAGE) Utah State University Caption Researchers examined filters from field sites in several national parks and wilderness areas and did visual counts of microplastic beads and fragments deposited by wind and precipitation. The pennies are used to hold each filter in place on the microscope stage. Credit Brian Kartchner, Utah State University Usage Restrictions With photo credit and in compliance with the paper's embargo specifications License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.