Self-healing materials: the trick is to make them bleed

The American Chemical Society released a video yesterday detailing some recent advances in the world of self-healing plastics and electronics. The results are impressive. The new materials aim to mimic the way human skin heals itself -- by bleeding. The chemists have fabricated microscopic bubbles of liquid material that, when a material is scratched or torn, "bleed" healing material that almost instantaneously repairs the circuit.