Distant rumbles

Carl Jung called it 'synchronicity', so did the Police - a way to describe the parallel development of the same idea in distant places. A particular type of hat appears in Europe and Polynesia during the middle ages, for example, one made out of bronze, the other of bark and feathers. Clearly, they are the same hat, but with no way the two hatters could have compared designs. Communication is a lot easier in this millennium, with much cross-fertilization going on in our global economy. Nonetheless,