Cuddly Squirrel or Gray Menace?: When Invasive Species Pose an Environmental Threat [Features]

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Gray squirrel may look cute and harmless with their twitchy noses, piercing peepers and oh-so-bushy tails. But an international team of scientists recently named the furry beasties one of Europe's 100 worst environmental offenders. Their crime? Driving the equally adorable European red squirrel toward extinction. [More]