Sturgeon, fish that once swam with dinosaurs, are fighting back from extinction as the US cleans up its waterways

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Sturgeon were America’s vanishing dinosaurs, armour-plated beasts that crowded the nation’s rivers until mankind’s craving for caviar pushed them to the edge of extinction.But more than a century later, some populations of the massive bottom feeding fish are showing signs of recovery in the dark corners of US waterways.Increased numbers are appearing in the cold streams of Maine, the lakes of Michigan and Wisconsin and the coffee-coloured waters of Florida’s Suwannee River.A 4.2-metre Atlantic…

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