Human evolution has long been tied to growing brain size, and new research suggests prenatal hormones may have played a surprising role. By studying the relative lengths of index and ring fingers — a ...

Researchers in Alberta uncovered a fossil fish that rewrites the evolutionary history of otophysans, which today dominate freshwater ecosystems. The new species, Acronichthys maccognoi, shows early ...

Two new studies add to the evidence that human activity, from fishing to urban development, is driving the evolution of wild animals. By Emily Anthes Call it the case of the incredible shrinking cod.