This tiny robot can melt, escape from a prison by sliding through secure bars, and then reform into a solid and complete tasks. The metal microbot, made out of liquid metal microparticles that can be steered and reshaped by external magnetic fields, has been widely compared to the character T-1000 in “The Terminator” movie franchise, a cyborg assassin played by Robert Patrick that could morph his way around solid objects before embarking on a murderous rampage. But, in contrast with the film, th