The world is filled with mysteries so common-place that we don’t always see them as mysteries. One that hits close to home is being left-handed. Science still can’t explain why most folks are born right-handed. It could be tied to that right-brain, left-brain thing. There’s a theory that mankind started out pretty even-handed, but as tool-making ramped up during the Bronze Age, right-handedness became dominant. If early man had decided that making cave paintings was more important than making spears, who knows … maybe we’d be mostly left-handers. Could be we all got dealt a bad hand on that one.