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Science 17 March 2006:
Vol. 311. no. 5767, pp. 1559 - 1560
DOI: 10.1126/science.1123995
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Perspectives

MATERIALS SCIENCE:
Artificial Muscle Begins to Breathe

John D. Madden

In robots, the power source is usually distant from the actual moving parts, which can be inefficient. One solution is to provide power locally, as in real muscles, by incorporating fuel cell technology directly into artificial muscles.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)