In water, it probably swam like a cross between a modern whale and a seal, the scientist said.

It is believed that they therefore did not have the social capabilities of modern whales.

In their turn, the basilosaurids led to modern whales.

Prosqualodon was related to and looked like modern toothed whales.

They were the ancestors of modern whales, dolphins, and porpoises.

Occasionally, the genes that code for longer extremities cause a modern whale to develop legs.

It may be larger than A. fragillimus and rival the modern blue whale in size.

This trend led to the largest animal of all time, the modern blue whale.

Only the modern blue whale is larger than these creatures; no land animal comes close.

According to the biologists, the Ambulocetus species were the forefathers of the modern whale.