Real-Life Zombies | National Geographic

In a spooky coup, a parasitic worm hijacks a snail's brain and makes the snail sacrifice itself to a hungry bird. Carl Zimmer, a contributor to National Geographic's "Phenomena" science salon and author of the book "Parasite Rex," explains how the snail's death helps the parasite perpetuate its sneaky species.
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Real-Life Zombies | National Geographic
Real-Life Zombies | National Geographic

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