Microplastics (1 of 3) (IMAGE) Cell Press Caption Microscopic fragments of plastic -- or microplastics -- are pieces of plastic less than 5 mm in diameter and are a global marine pollutant. This image shows microplastic fragments and pre-production pellets collected from a sandy shoreline in Europe; these items are continually fragmenting in the environment. In this issue, experiments were conducted with sediment dwelling marine worms, showing that chemically inert microplastics of a size similar to sand grains from the beaches in which the worms lived caused physical harm (Wright et al.) whilst Browne et al. showed microplastic can move pollutants and additives to worms, reducing functions linked to health and biodiversity. Credit <i>Current Biology</i>, Wright et al. Usage Restrictions Credit Required 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.