Some fishlike vertebrates had already begun to evolve limbs by around 400 million years ago: They were called "lobe-fins," with fins that looked like fleshy paddles, and they had lungs as well as ...

Projecting from the body on stalks rather than attaching directly to the body, these fishes' paired lobe fins are supported by the same basic bones as your arms and legs. Coelacanths even move ...

In a shallow area near the water's edge, something happened that would forever change life on our planet: a fish from the class of lobe-finned fishes uses its pair of powerful pectoral fins to ...