A wild tomato species adopts local fruit color via introgression from an endemic relative, during its invasion onto the Galápagos Islands.

At Cuatro Ciénegas, the ancestral niche conditions of the ancient shores of Laurentia persisted along with its microbial communities that have been coevolving for a very long time.

Primate hand preference strength but not direction (left vs. right) generally reflects phylogeny and ecology at species level, but human handedness deviates markedly from all other species.

Neotropical outstanding biodiversity emerged from sustained rates of species accumulation over time, although, for some periods, tetrapods were less successful than plants in keeping pace with a changing environment.

Animals’ tool-handling behaviour can be used to make inferences about the value they ascribe to different tool types, unlocking considerable research potential for observational and experimental studies across diverse species.

Genetic analyses reveal that neuroanatomical areas that are developmentally related co-evolve with one another.

Hybridization not only generates genetic diversity, but this diversity can alter the shape of the fitness landscape, changing which genotypic combinations are favored by natural selection and which accessible genotypic paths lead to novel fitness peaks.

One-quarter of the Chondrichthyes have an elevated risk of extinction, mainly as a result of overfishing.

A rigorous and transparent evaluation of mesenchymal stem cell therapy for sepsis suggests it may be efficacious, although the strength of these findings is tempered by threats to validity in the studies that were included.

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.