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The popular science media are abuzz over the creation by scientists of a synthetic jellyfish, called a medusoid, using silicone and a rat’s heart muscle cells (Nawroth et al., 2012). Explains Nature News, “When placed in an electric field, it pulses and swims exactly like its living counterpart.”

The authors of the study examined the tissue layout and dynamics of motion of the common moon jelly (Aurelia aurita) and created a jellyfish-like frame using a silicone polymer, on which they grew a layer of rat heart muscle.

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