BacillaFilla . . .

SOME VERY CLEVER YOUNG FOLKS AT NEWCASTLE UNIVERSITY have developed "BacillaFilla".  It's a genetically-engineered bacteria that repairs the cracks in concrete. According to io9,

BacillaFilla is the kind of biotechnology crossed with materials science that we'll see a lot of in the future. The researchers point out that patching concrete cracks with bacteria is far less environmentally harmful than whipping up a vat of cement. Naturally green, BacillaFilla is an industrial material of the future.