An estimated 300 trillion invasive mussels blanket Lake Michigan -- and eradication may be impossible
A clump of mussel shells wash up along the shore of Good Harbor Bay Beach on July 25, 2021 in Leelanau County, Michigan. - Stacey Wescott/TNS

SLEEPING BEAR DUNES NATIONAL LAKESHORE — The divers leaned back from the edge of the boat and splashed into water, bobbing up for a moment before dropping down to a world just a few miles off the northern Michigan coast — and worlds away from the one above the surface. Today in Lake Michigan, quagga mussels, Eastern European invaders generally smaller than a stamp, reign over an upended underwater ecosystem. The mussels arrived in the Great Lakes more than three decades ago, eating, excreting and spreading zealously ever since, attaching themselves to everything from water intakes to shipwreck...