Brains come in a variety of sizes. Several orders of magnitude separate the convoluted human brain from that of the fruit fly. But no matter the configuration, neuroscientists strive to study neurons in further and further detail, ideally at the single-cell level. However, consistently identifying individual neurons is not an easy endeavor; in most organisms there are so many neurons that even when labelled with colored tags we can’t see the forest for the trees.

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