Slate has a piece up about keys. Yes, keys:
It’s a metal form that—when inserted into an opening and turned—draws back a bolt or latch. But the metal key is marked for extinction. Electronic access controls—keycards, keypads, biometric scanners, and the like—are already common in hotels, office buildings, and cars, and they’re gaining ground. What will we lose when the metal key, a form that has endured for centuries, disappears? And what will we gain?
It’s one of those illustrated slideshow-esque articles, but still worth it. Read it!
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