Analyzing the genomes of rock pigeons demonstrates that genetic variation comes in many forms and can have unexpected origins.

Different kinds of molecular changes at one genetic locus control different feather pigmentation patterns, and the darkest patterns resulted from hybridization with another species.

The experience-dependent representation of time interval in the seconds-to-minutes range occurs as early as at the thalamic level in the brain.

Shigella flexneri, globally the most frequent cause of bacterial dysentery, is far more diverse, and has caused disease around the world for far longer than other Shigella species by persisting in local environments over extended timescales.

A combined NMR and kinetic study demonstrates how the dynamic transition of a molecular chaperone between different oligomerization states can modulate its activity by altering the binding kinetics and energetics of non-native proteins.

Feathered feet of pigeons and chickens result from a partial molecular and morphological transformation of legs to a wing-like identity.

Cuticulosomes are organelles found in the hair cells of birds that are composed of ferritin nanoparticles, form rapidly after hatching by the fusion of vesicular structures, and may play an indirect role in magnetic sensation.

Cooperation between evolutionarily disparate CRISPR-Cas modules allows bacteria to counter mutational escape by viruses.

Studying the development of the medial amygdala in the mouse reveals how the brain may potentially process sex differences in innate behaviors such as mating.

A histone modification that alters the nucleosome structure occurs in mitosis and promotes chromosome packaging and the timely removal of condensin I and cohesion, to achieve chromosome segregation.