'Green' robot self-propels through sea

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'Green' robot self-propels through sea

A seagoing glider that uses heat energy from the ocean to propel itself is the first "green" robot to explore the undersea environment, U.S. researchers say.

"We are tapping a virtually unlimited energy source for propulsion," Fratantoni said.

http://www.news.com/Green-robot-self-propels-through-sea

That's pretty cool, one of the first green robot. They say it is working since december. It seems to get its energy from temperature differences.

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