The Hoberman Twist-O is a popular toy that uses a network of struts and hinges to expand its diameter from 6 to 15 inches. Inspired by the movement of the toy, the hingeless buckling of the Venus Flytrap, and the reversible actuation of viruses, Jongmin Shim et al. (pp. 5978-^-5983) introduce a hollow deformable sphere that the researchers dub the "Buckliball." The Buckliball is a spherical shell patterned with a regular array of circular holes. Below a critical pressure, the shell compresses such that the narrow ligaments between the voids buckle, and the rest of the ball's skeleton compresses in a cooperative buckling cascade.
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