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Certain neurons encode memories of events that occurred in specific physical locations known as place fields. Chickadees show patterns of neuronal activity that are specific to locations of hidden food but independent of place fields.
A deep neural network with ‘knockout training’ is used to model sensorimotor transformations and neural perturbations of male Drosophila melanogaster during visually guided social behaviour and provides predictions and insights into relationships between stimuli, neurons and behaviour.
Simple analytic estimates and detailed numerical calculations show that the solar dynamo begins near the surface, rather than at the much-deeper tachocline.
We analyse cell division in ichthyosporeans and find that multinucleated life cycles favour the evolution of closed mitosis, in which the cell constructs a spindle within an intact nucleus.