These spines were a distinctive feature of its back

Ceratosaurus was a medium-sized bipedal dinosaur

The discovery of Antarctopelta not only expanded the known geographic range of ankylosaurs

Swimming in concentric circles

a relatively short tail

Protemnodon anak Variant:Hand-painted These spines were a distinctiveProtemnodon anak was a large diprotodontid marsupial from the Pleistocene of Australia and New Guinea, belonging to the macropodidae group, which includes modern kangaroos and wallabies. It represents one of the largest species within the genus Protemnodon, characterized by a more robust body build and less specialized for jumping than modern kangaroos. Its skeleton shows a massive body, with a strong and relatively rigid spine, adapted to support