Who’s got no respiratory system, no circulatory system, no skeleton, and a mouth for an anus? This guy. The aptly named hammerhead worm belongs to one of the most primitive animal groups in the world ...
When Endless Thread producer Nora Saks learns that a "toxic, self-cloning worm that poops out of its mouth is invading Maine", she starts sounding the alarm about the impending eco-doom. Until, that ...
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