This ancient bird has a modern tail bone.

Distantly related, lookalike Heliconius species arrive at the same appearance using the same few genes, but regulated differently, according to recent studies.

The 12-million-year-old bones of a previously unknown species named Danuvius guggenmosi challenge the prevailing view about when and where our ancestors first started walking upright.

A mixture of chemicals induces reactions reminiscent of life on pyrite.

From regulating each other’s gene expression to encoding different parts of the same proteins, the two genome types in every eukaryotic cell are far from independent.

The Yale biologist says that organisms’ behavior, physiology, and morphology engage in a constant “evolutionary dance.”

Interactions between mitochondrial and nuclear genomes have further-reaching effects on physiological function, adaptation, and speciation than previously appreciated.

The site, Corral Bluffs in Colorado, also reveals how plants evolved and how ecosystems rebounded after the asteroid impact.

The evolution of different ways of flying in birds affected wing range of motion, but not wing shape.