Engineers reinvent the 5,000-year-old gear using fluids instead of solid teeth.

Decorating a surface with a forest of microposts can either make it repel water or cause it to be sucked into the spaces between posts. In the latter case, the shape of a liquid on the surface can be ...

Abstract: As an emerging multifunctional material, Gallium based room temperature liquid metal attract particular attentions in a variety of applications due to its mobility and deformability. However ...

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