Pakicetus: An Unlikely Ancestor Of Whales
Pakicetus lived around 50 million years ago in the area that is now Pakistan. It was about the size of a dog, and ate a carnivorous diet of meat and fish. Its long skull and distinctive ear bone link its anatomy to that of modern-day whales. Though members of the genus are often illustrated as furry mammals, they probably didn't have too much body hair.
from Green TV
Key Facts In This Video
All marine mammals evolved from land mammals. (0:11)
Rodhocetus had nostrils at the top of its head to help it breathe while it swam. (0:52)
Basilosaurus grew up to 20 meters in length. (1:31)