The Illinois River’s invasive Asian carp are suddenly vanishing, and scientists were stunned by the real cause. For years, the massive fish threatened to invade the Great Lakes, prompting costly
In stretches of the Illinois River, Asian carp once made up 70% of everything alive. Today, in the upper pools closest to Chicago, their numbers have fallen by more than 90%. Nobody can point to the weapon that did it.Illinois spent over a billion dollars fighting these fish, so everyone assumed the money finally worked. Then scientists checked, and the real cause was not the money, not the barrie…