But leeches aren’t just useful at crime scenes. These creatures’ sanguineous appetites have also come in handy for scientists, who are hoping to use them to solve another mystery: the diversity of ...
SARANAC LAKE — Perhaps the best way not to find leeches is to go looking for them. There are some 700 species of leeches in the world, and about 500 of them live in freshwater. Not all of them ...
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