Fish have been swallowing microplastics since the 1950s

Researchers examined the guts of freshwater fish preserved in museum collections; they found that fish have been swallowing microplastics since the 1950s and that the concentration of microplastics in their guts has increased over time.
Read more: https://www.eurekalert.org/pub_releases/2021-04/fm-fhb042921.php?source=Snapzu