AP Photo/Kai-Uwe Knoth
Two so-called 'AquaJellys' swim in a water tank at the stand of FESTO at the "Hannover Messe" industrial trade fair in Hanover, Germany, April 22, 2008. The robotic jellyfishes with autonomy and adaptive behaviour consist of a sphere-shaped body with eight electrically-driven tentacles for propulsion.
REUTERS/Christian Charisius
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