Flying Robot Moves Like a Jellyfish

Miniature robots can fly like helicopters and insects. Why not a jellyfish?
Weird as it sounds, Leif Ristroph of New York University decided that the aerodynamics of jellyfish offered a good method of designing a flying robot while keeping the size down. Air and water are both fluids, after all — the latter is just thicker.
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Turtle Robot Dives Wrecks

Diving shipwrecks can be dangerous work. As their name implies, these deep sea curiosities are underwater disaster zones that could trap an unwary diver.
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Palm Size Drones Buzz Over Battlefield

Weighing only 0.56 ounces (16 grams), the Black Hornet looks like a tiny toy helicopter. But it's really a nano-size piece of military hardware

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Pee Powered Robot

There's a new use for artificial hearts, and it involves a more taboo bodily fluid than blood. A device that mimics the squeezing action of the human heart has been used to pump urine into a microbial fuel cell, which could power robots that convert the waste into electricity.

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