Recent studies have shown that male fruit flies use close-range olfactory cues to assess the status of potential mating partners. The presence of a volatile, male-derived pheromone can suppress the default male behavioral state of courting females.

Although IgA deficiency (IgAD) is currently recognised as the most frequent immunodeficiency in humans, individuals with IgAD are largely considered to be healthy and when discovered are usually not investigated further or followed up. The rare occasion when IgAD is a cause for concern is when these individuals require blood or blood products, in which case current practice advises that product...

Swift action is often required in the face of indeterminate sensory evidence. In this issue of Neuron, Song et al. (2017) describe an inhibitory circuit in the posterior parietal cortex that evaluates conflicting auditory and visual cues and supports resolute perceptual decision making.

Plant growth is tightly controlled through the integration of environmental cues with the physiological status of the seedling. A recent study now proposes a model explaining how the plant hormone ethylene triggers opposite growth responses depending on the light environment.