The two modern parvorders of cetaceans – Mysticeti (baleen whales) and Odontoceti (toothed whales) – are thought to have separated from each other around 28-33 million years ago in a second cetacean ...

The fossils of Al-Hitan show the youngest archaeocetes, in the last stages of losing their hind limbs. Other fossil material in the site makes it possible to reconstruct the surrounding environmental ...

A recent analysis of 201 living and extinct cetacean species highlighted three key periods of rapid evolution in cranial morphology, particularly during the transition from early archaeocetes to ...