When most people think of worms, they imagine harmless garden creatures wriggling through soil. Yet, the world of worms is far more sinister. Some are terrifying predators, invasive parasites, or ...

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A terrifying look at the Bobbit worm, a segmented marine predator that burrows into the sand and uses razor-sharp jaws to snap unsuspecting fish in half with lightning speed. Jesse Watters: Americans ...