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The ability of carbon nanotubes to withstand repeated stress yet retain their structural and mechanical integrity is similar to the behavior of soft tissue, according to a new study from Rensselaer Polytechnic Institute. When paired with the strong electrical conductivity of carbon nanotubes, this ability to endure wear and tear or fatigue suggests the materials could be used to create structures that mimic artificial muscles or interesting electro-mechanical systems, researchers said.