Blimps to Swim Through the Air like Fish

Blimps steered by artificial muscles may one day swim through the air like fish, suggest recent flight tests. The blimps would be much quieter than those steered by traditional blimp propellers, making them ideal for observing wildlife.

Researchers believe artificial muscles – plastics that stretch when a high electrical voltage is applied – could be a way to mimic nature's efficiency at accomplishing tasks. Using the technology, future robots may be able to "run on Mars like a cheetah, climb a mountain or a cliff like a gecko, or fly like a bird", says Yoseph Bar-Cohen, a physicist at NASA's Jet Propulsion Laboratory in Pasadena, California, US.