Among the factors that predict fitness in wild baboons, dominance rank in males, but not in females, is the best predictor of epigenetic aging.

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.

A neural circuit that can selectively induce sleep-like patterns in small regions of the brain demonstrates how sleep and arousal states may be controlled in local brain regions.

Call-based vocal communication of individually recorded zebra finches changes in social groups across reproductive stages and is related with successful egg laying.

Socio-economic hierarchies may be bad for health, even among people living in a relatively traditional, small-scale society in the Bolivian Amazon.

Hypothetical battles between animals can be used to interest the general public in biology.

Seminal fluid harbours the as yet unknown mechanism that facilitates rapid adjustment of sperm velocity in response to changing sperm competition risk.

In light of the mysteries underlying the biphonic nature of Tuvan throat song, information from multiple modalities is combined to explain how this remarkable phenomenon is achieved biomechanically.

A computational model shows that natural selection can cause populations to evolve a distinctive population-level phenotype: the ability to transition between collective states in response to the environment.

Experimental manipulations and environmental gradients, the two common-used approaches, are not at all comparable for predicting the impacts of climate change on nutrient cycling.