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We’ve all lifted a rock or flowerpot and found a long, slimy worm underneath. But have you ever done so and found a long, slimy worm with a head shaped like a shovel or a hammer? If you have, you ...

Some segmented sea worms like the syllid worm go through a reproductive process called stolonization. The stolon is the worm’s posterior organ and it is full of eggs or sperm depending on the worm’s ...