In this episode, we continue our conversation with two NOAA scientists about a study that looked at using mussels as "biomonitors" to measure microplastic pollution in the Great Lakes. Here, they discuss how their study was set up and how the scientific method works. Amy and Ed also discuss how unexpected results are often part of the scientific process, and how conducting a study in the field with living organisms ist so challenging. This is part two of a two-part episode.