Mammal evolution to upright posture followed complex branching path rather than simple step-by-step progression.

In Vermont, researchers have investigated the types of creepy, crawly bugs that their avian predators consume and may have ...

Two new studies add to the evidence that human activity, from fishing to urban development, is driving the evolution of wild ...

Chipmunks are members of the same family as squirrels. The small rodents spend most of their time aboveground, eating seeds, nuts, fruits, insects, and even frogs. Voles, on the other hand, are more ...