It's neither Terminator nor science fiction. A team of scientists from Sandia National Laboratories and Texas A&M University has witnessed a surprising phenomenon: for the first time in history, they have observed how a metal breaks and then fuses back together without any human intervention; a self-repairing metal.

"It was absolutely stunning to see it firsthand," said Brad Boyce, a scientist from Sandia National Laboratories who led the study with Texas A&M University, and it has been covered by the journal Nature.

The scientists intended to evaluate how cracks would propagate through a 40-nanometer-thick piece of platinum when pressure was applied.

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