Ancient Four-Legged Whale Swam Across Oceans, Walked Across Continents

By Kimberly Hickok Picture an animal that looks like a mix between a rhino and a sea otter: It has a narrow head; a long, muscular tail; and four stocky legs with hoofed toes and webbed feet. A new study suggests that’s more or less what the walking, swimming ancestors of modern-day whales looked like …