• Its movement is driven by inflatable compartments and its stiffness by a central tube containing a specially selected granular medium: coffee. When suction is applied, the granules "jam" to create the desired rigidity.
  • The current prototype is 14cm long and 3cm across and split into two sections. Running the length of each section are three cylindrical chambers that can be pumped full of air to varying degrees, lengthening or bending the arm.
  • Ultimately, the researchers hope to develop the device so that it can be used in "minimally invasive surgery" - operations performed via a body cavity or a keyhole-type incision.

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