Jellybot: Sung-Weon Yeom and Il-Kwon Oh From Popsci.com:
Even though a jellyfish is 90 percent water, it moves at about 40 mph. Jellyfish use their bell -- the top portion, above the tentacles -- to create a jet that propels them through water. Now, scientists at the Chonnam National University in the Republic of Korea have built a robot that mimics the movement. The robot, using an electro-active polymer artificial muscle, retracts and expands its skirt, exerting a minimal voltage and propelling the jellybot faster than you can swim.
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