Mapping the brain won’t unlock all its secrets. That’s a good thing.

There’s a quote attributed to New Zealand physicist Ernest Rutherford that goes something like this: “All science is either physics or stamp collecting.” In other words, some scientists perform experiments to explain how things work, while others don’t test specific hypotheses but instead observe the natural world and take note of what they find. The latter may seem inferior, but don’t underestimate the influence of observational science; after all, biology’s greatest stamp collector was probably Charles Darwin, who planted the seeds of his theory of evolution by natural selection in his detai

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