hace aproximadamente 68 a 66 millones de años en lo que hoy es América del Norte

Ambulocetus natans was an extinct species of mammal that lived during the Eocene period

they were shown in their calmest and most peaceful state

and reptiles

with its wiry fur and imposing fangs

Sinomegaceros pachyosteus Sauropoda hace aproximadamente 68 a 66Sinomegaceros (S. pachyosteus 'thick boned') is an extinct species of giant deer that inhabited what is now China during the Pleistocene of the Quaternary period, about 2. 5 million years ago to about 11,500 years ago. This species belongs to the true deer family (Cervidae) and is known for its large size and unique features in its bone structure. The limb bones of Sinomegaceros are particularly thick and strong, suggesting that this deer may have