A sexually dimorphic circuit node controls a persistent, internal state that promotes fighting and mating in Drosophila, revealing parallels with mammalian systems suggestive of a conserved circuit "motif" controlling social behaviors.

Functional dissection of a cluster of male-specific neurons in Drosophila reveals a neuronal circuit regulating male courtship in accordance with the internal drive state.

A genetic pathway involved in development works together with the sex-determination pathway to control the timing of sexually dimorphic neural development in C. elegans.

The balance between sleep and sex drives determines whether male flies sleep or court, and a subset of octopaminergic neurons interact with the Fruitless-expressing courtship circuit to suppress sleep for sustained courtship.

The relentless expansion that threatens the sustainability of biomedical research in the US takes a heavy toll on young researchers.

A better understanding of the mechanisms underpinning the growth of mycobacteria could help identify targets for new antibiotics.

A lexicon to help scientists and philosophers discuss the meaning of function in molecular biology more clearly is proposed.

A new study upturns the long-held belief that in fruit flies, the yellow gene determines sex-specific behaviors by acting in the brain.

The cellular and molecular substrates that underlie the programmed behavioral response to a gustatory sex pheromone have been identified.