Fruit flies (Drosophila melanogaster) display a suite of complex behaviours, including courtship dances and learning1. But understanding the neural networks that drive these behaviours remains a challenge. The data from this image, published on 19 July in Cell2, resolved the insect’s brain down to individual cells — revealing some neurons that have never been seen before. This offers scientists a new tool with which to study fruit-fly behaviour and allows them to compare the insects' neural networks with that of other species.
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