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Genetically modified microbes can repair concrete cracks

The genetically modified microbe has been programmed to swim down fine cracks in concrete and once at the bottom it produces a mixture of calcium carbonate and a bacterial glue. This glue combines with the filamentous bacterial cells, ultimately hardening to the same strength as the surrounding concrete and essentially “knitting” the building back together.

I see a Stephen King novel here. The microbes come under control of a remote, malicious entity and begin to destroy concrete rather than repairing it.

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  • Or worse, they start to knit together windows and doors so that they don’t open, seal vents in buildings, close drains and our civilisation sinks into oblivion.