Jill Jordan Sieder

For the past three and a half decades, zebra and quagga mussels have fundamentally altered the ecology and hijacked the food web of the Great Lakes.Now scientists are trying new ways to put the mollusks in check, including infecting them with parasites and even crushing them with huge rollers. But will it be enough?

For the past three and a half decades, zebra and quagga mussels have fundamentally altered the ecology and hijacked the food web of the Great Lakes. Now scientists are trying new ways to put the mollusks in check, including infecting them with parasites and even crushing them with huge rollers. But will it be enough?