This is my thumb. There is nothing extraordinary about it. It is not particularly attractive. It is about as normal a thumb as you will find. It serves me well, and I am rather attached to it. The whole “opposable thumb” idea was a winner from the get-go. If you look closer, you can see something wrong with my thumb: See that dark triangle? It does not belong there. I know it doesn’t look like much, but looks can be deceivi...
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