Scientists find the molecule that delivers itchiness signals to the brain via a dedicated, and previously unknown, neural pathway.
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Image of the Day: Clingy Worms
The parasite Schistosoma burrows through human skin, attaches to veins with a sucker (pictured here), and lays eggs, which the body expels in fecal matter, ready to infect anew.
| March 5, 2013
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