Every summer Ashlee Rowe of Michigan State University spends a few weeks catching bark scorpions by the light of the moon. These stinging critters carry venom that is severely painful to humans but certain animals, like the grasshopper mouse, seem to have no reaction. Rowe's team is looking into why some animals feel no pain when stung and how this resistance can aid the development of treatments for pain in people. Part of the XX Files series on extraordinary science by extraordinary women from Science/AAAS.
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