Scientists observe metal repairing itself for the first time. Could Terminator robots be on the horizon?

Robert Patrick as the sinister self-healing T-1000 in the movie Terminator 2: Judgement Day (1991)

For the first time, scientists have spotted metal healing itself after cracking — an observation that could pave the way for the creation of structures and robots capable of mending themselves. 

But for those worrying about the rise of real-life Terminator robots — don't: The newly discovered mechanism only works on a few metals and on incredibly small scales — at least, for now.