Scientists accidentally discover self-repairing metal – study
The observation could revolutionise the engineering industry.
Green marks the spot where a fissure formed, then fused back together in this artistic rendering of nanoscale self-healing in metal, discovered at the U.S. government's Sandia National Laboratories, in this undated handout image. Red arrows indicate the direction of the pulling force that unexpected(photo credit: Dan Thompson/Sandia National Laboratories/Handout via REUTERS)Updated: 
