BeetleBot uses printed soft muscles and finger control to retrieve objects

A small robot walks around an obstacle, closes its gripper on an object and carries it away while its operator bends a finger to issue commands. BeetleBot moves its legs with heat-contracting, printed artificial muscles rather than conventional motors. The Caltech, KAIST and Nanyang Technological University collaboration published the research in Science Advances on August 19, 2026. KAIST described it in October.

The muscles use a flexible polymer called a liquid crystal elastomer. Electric heating makes the material shorten, and separately controlled muscle groups turn that contraction into steps and changes of direction. A soft gripper borrows the shape of a beetle's jaws. Its pressure sensor detects contact, giving the system information beyond whether a close command was sent.

A stretchable patch on the operator's finger supplies the commands. Changes in its electrical resistance are classified as forward, left, right or grip, then transmitted over Bluetooth. Camera images and pressure measurements return to the user, who decides the next move. The paper describes an eight-segment object-retrieval demonstration. This is a human-guided feedback loop, not evidence of an autonomous insect-like helper. The finger patch also uses a tethered signal-acquisition unit, even though commands reach the robot wirelessly.

Bringing movement, manipulation and sensing into one compact soft robot is the useful step. It could eventually help people inspect tight spaces or recover small objects without reaching inside themselves. KAIST says practical deployment still requires faster, more efficient muscles, better power arrangements and testing in real operating conditions. The demonstration does not establish an industrial inspection product or a device ready to work inside the human body.

Research credit: the BeetleBot authors, independently adapted under CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ .

Original source publication dates: Science Advances, August 19, 2026; KAIST, October 13, 2026. Neither source supplies a verified publication clock time. Exact Beijing-time and US Eastern-time (EDT) conversions are therefore unavailable; these are the dates printed by the sources.