A robot that can switch between liquid and solid.

Researchers from Seoul National University and Gachon University created a liquid-metal robot filled with magnetic particles. When a magnetic field is applied, it becomes rigid. When the field is removed, it flows like a liquid.

In tests, it squeezed through tight gaps and then hardened again to keep its shape. A glimpse of how future robots could move through places traditional machines cannot.

Source: Science Advances

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