The Wire That Remembers Its Own Shape - Video

Crumple it into a mess, drop it in hot water, and it springs back into a perfect pre-set shape within seconds. Nitinol is a nickel-titanium alloy that undergoes a change in its crystal structure at around 104°F — snapping back to whatever shape it was trained to hold. The same alloy is used in NASA's Mars rover wheels and in heart stents.

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