Dennis Hong, a robotics engineer at Virginia Tech, said research into "soft robotics" was part of a wider trend towards designing more flexible and innovative machines, such as his own "Whole Skin Locomotion" (WSL) robotic mechanism.

CNN: Robotics discovers its soft side

Last month DARPA, the U.S. Defense Department's research agency, invited proposals from robotics experts to build a "chemical robot" made from soft, flexible materials and capable of squeezing through gaps smaller than its regular dimensions.

CNN: Robotics discovers its soft side