Robojelly Generating Fuel From Surrounding Water

A jellyfish moves using circular muscles in the inside of its umbrella-like bell. As the jellyfish contracts, the bell closes in on itself and ejects water to propel itself forward. When the muscles relax, the bell regains its original shape. By keeping that in mind, Engineers in the US have invented a hydrogen-powered robotic jellyfish that moves through water like a jellyfish. They call this Robojelly. As it is a hydrogen-powered robot, it will not run out of energy.

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