A fun paper on creating a simple type of programmable matter: http://www.pnas.org/content/pnas/107/28/12441.full.pdf … The idea is very simple and clever (cont):
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Ah, the conclusion pretty much confirms this: it's possible, but they didn't do it (they had one-way actuators)pic.twitter.com/NLpVQSa1Ex
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I believe - I'm not sure - that something similar is true of many proteins: they can fold into several different forms, and those different forms can all be useful. (Not universal in the same sense, but multi-purpose in a useful way!)
