New Scientist has round-up on exotic materials
Exotic material fun
The New Scientist has a nice round-up post on exotic materials, including odd stuff that gets fatter when it's stretched, frictionless superfluids, ferrofluids, and some neat and improbable dry ice stuff.
Like: Dilatants - fluids that get more solid when stressed. The classic example is a mixture of cornflour and water - it's runny until you hit it when it becomes solid.
There is a video that shows how it is possible to run across an apparently liquid pool of the stuff because your footfalls solidify it. If you stop, you sink.
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Via: BoingBoing
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