What do scientists think about the common ancestor of whales and hippos is it the animal had two limbs the animal live millions of years ago the animal is still alive today the animal lives in water

Scientists believe that the common ancestor of whales and hippos was a four-legged land mammal that lived millions of years ago. This animal is thought to have inhabited both land and water but eventually evolved into separate lineages, leading to the modern-day whales and hippos. However, the common ancestor itself is no longer alive today.