I am particularly impressed by one aspect of their versatility; the fact the spatial orientation does not affect their operation. The fact that they can be installed vertically and yet still do not allow anything to flow through them under the influence of gravity definitely increases their reliability in sensitive medical design.
Two different shape-shifting polymers have been announced from two different universities: Wyss Institute at Harvard University and Zhejiang University in eastern China. Both of them change their shapes when immersed in water, and the one from Wyss Institute was made with 3D-printing techniques.
When you think of the DARPA Robotics Challenge, you may imagine complex humanoid contraptions made of metal and wires that move like a Terminator Series T-90. But what actually happened at the much-vaunted event was something just a bit different.
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