Scientists discover metals can self-heal cracks through "cold welding" process

Scientists observed platinum and copper self-healing cracks at the nanoscale through a process called cold welding.
The metals exhibited the ability to heal fatigue damage caused by repeated stress and motion.
This self-healing occurred spontaneously at room temperature when the metal surfaces were close enough for their atoms to bond.
While limited to the nanoscale for now, this discovery may lead to self-healing machines and structures in the future.
The phenomenon resembles the advanced healing abilities of the T-1000 in Terminator 2.