The BBC has an article on efforts to develop super-strength artificial muscles. [Researchers at the University of Texas said the muscles] said the muscles could be used in “exoskeletons” to give superhuman strength to certain professions such as firefighters, soldiers, and astronauts (not to mention cartoonish supervillains.)
The most powerful type, “shorted fuel cell muscles” convert chemical energy into heat, causing a special shape-memory metal alloy to contract.
Turning down the heat allows the muscle to relax.
Lab tests showed that these devices had a lifting strength more than 100 times that of normal skeletal muscle.
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