00:00If you take a knife and nick the deer antler, a small bump can form as it heals and keep
00:05growing
00:06with the antler. A few months later, the antler hardens, falls off, and the injury disappears with
00:12it. But the next year, as a brand new antler starts growing, an extra branch can appear in
00:19nearly the exact same spot as the nick. It's an entirely new antler, but somehow the deer's body
00:26still remembers where it happened, and scientists still don't know where that memory is being
00:32stored.
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