Add Yahoo as a preferred source to see more of our stories on Google. The invasive quagga mussels found in an Idaho river in 2023 were microscopic. But to state officials, their presence was enormous.

The invasive quagga mussels found in an Idaho river in 2023 were microscopic. But to state officials, their presence was enormous. Though the mussels couldn’t grow much larger than a nickel, state ...