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A microbiologist in the Netherlands invents living "bioconcrete" filled with a bacteria that heals its own cracks.

A concrete petri dish. (via Delft University)

Concrete is a wonder material, but it doesn't always stand up to the ravages of nature. If water gets into even the smallest cracks in the concrete and freezes, it blows the cracks wide open. Then your basement floods. However, buildings in the future might never have that problem, because we now have concrete that heals itself.

Sources: CNN.com