Here is a 20m robotic arm with 20 joints driven by pneumatic, thin artificial muscles and arm structures supported by helium-filled balloons. The Giacometti Arm weighs only 1.2kg. It has a camera, so it can perform well in search and inspection missions.
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20m Super Long Robot Arm - Giacometti Arm with Balloon Body -
Suzumori Endo Lab in Tokyo Institute of Technology was behind this project.
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