A new model describes evolutionary transitions in individuality in terms of tradeoff and tradeoff-breaking events as opposed to changes in the nature of fitness.

In wild bonobos, sibling birth induced a sudden increase in urinary cortisol levels in the older offspring, a physiological response that occurred in all subjects and was independent of their age.

A female specifically expressed new protein-coding gene that has emerged out of non-coding sequences without detectable signatures of adaptive evolution affects female pregnancy cycles.

Selective sweepstakes from pervasive positive selection, rather than demographic changes or random sweepstakes reproduction, is the primary determinant of reproductive skew and genetic diversity in the highly prolific Atlantic cod.

Phylogenetic relationships between viral RNA segments are distinct between subtypes and lineages of seasonal human influenza A viruses and implicate RNA-RNA relationships as novel drivers of influenza virus evolution.

Amino acid and sugar supplement induce appendage/limb regeneration in cnidarians, insects, and mammals.

The evolution of multidrug resistance can be most easily understood by focusing upon the dynamical equations of linkage disequilibrium.

Nuclei of the true slime mold Physarum polycephalum are continuously shuttled within the cytoplasmic flow across the gigantic syncytium, yet Physarum can establish and maintain gene expression heterogeneity between different structures of the organism.

Fossilized feces (coprolites) of extinct bone-crushing dogs, Borophagus parvus, from late Miocene (6 million years ago) of California demonstrates consumption and preservation of bones in digestive tracts and potential social hunting behavior by these predators.

Evidence for a largely unexplored radiation of squamates (lizards, snakes, and amphisbaenians) in the Middle to Late Jurassic is revealed by analyses of morphospace expansion, disparity, and evolutionary rates.