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A century ago, it was possible for a physicist to know almost everything there is to know about physics. Now, however, that is not the case at all. It is not that today’s physicists are less competent. The problem is that humans know so much about the inner workings of the universe that it is impossible to become deeply familiar with it all. As a result, today we tend to produce specialists.
For example, I was originally trained as a relativist. General relativity and its quantum extensions to cosmology were my area of physics. Then,…
