Biodegradable surgical implants and surreptitious DNA archival.

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After badly breaking a load-bearing part of your body it's not uncommon for an orthopedic surgeon to install a couple of after-market bits of hardware to hold the bones together while they knit. This usually takes the form of a couple of titanium alloy screws, though plates, rods, and tubes are not unknown. The downside of using something made out of metal to put things back together is that the screw holes left behind after the implants are removed require additional time to heal. Plus, the holes further compromise the structural integrity of the bone until they fill in. In …

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