In 1988, zebra mussels arrived in North America through a ship’s ballast water; within 10 years, they had spread across all five Great Lakes
zebra mussels (Representative image by Canva) In the late 1980s, an aquatic invader quietly entered North America through an unlikely route: a ship’s ballast water. That species was the zebra mussel, and within a decade it had spread across all five Great Lakes, triggering one of the most notorious invasive-species stories on the continent. More…
