04 Feb 2019 --- Microplastics have been found in the guts of every marine mammal, including dolphins and whales, examined in a new study of animals washed up on UK shores. The new University of Exeter study joins an ever-growing list of research on the presence of microplastics in wildlife and natural habitats, from freshwater to marine settings. PackagingInsights takes a look at the most recent literature, consults experts on the topic, and asks: How big is the microplastics threat and is enough being done?