Media Summary: PBS Member Stations rely on viewers like you. To support your local station, go to ↓ More info below ... Examine the environmental pressures that turned a wolflike creature that hunted in shallow waters into a leviathan of the seas. Early ancestors of the ocean's biggest animals once walked on land. Follow their extraordinary journey from shore to sea.
Whales Have Legs - Detailed Analysis & Overview
PBS Member Stations rely on viewers like you. To support your local station, go to ↓ More info below ... Examine the environmental pressures that turned a wolflike creature that hunted in shallow waters into a leviathan of the seas. Early ancestors of the ocean's biggest animals once walked on land. Follow their extraordinary journey from shore to sea.
