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American researchers have created a robotic jellyfish, named Robojelly, which not only exhibits characteristics ideal to use in underwater search and rescue operations, but could, theoretically at least, never run out of energy thanks to it being fuelled by hydrogen. The video, provided by researchers at the University of Texas at Dallas and Virginia Tech, shows the potential of the robot as it is powered by electricity. From 00.01am GMT, the paper can be downloaded from http://iopscience.iop.org/0964-1726/21/4/045013 when it is published in IOP Publishing's journal Smart Materials and Structures. "Hydrogen fuel-powered bell segments of biomimetic jellyfish" Tadesse Y et al 2012 Smart Mater. Struct. 21 045013