the size of a large cat

moved gracefully through the water while swimming alongside it was an Archelon

Due to their size and appetite

hollow bones

sticky tar

Silesaurus opoliensis Scale:1:20 the size of a largeSilesaurus opoliensis, primitive dinosaur, although its exact classification has been the subject of debate in the scientific community. This dinosaur lived during the Triassic period, approximately 230 million years ago, in what is now Poland. Although it is called a dinosaur, some experts argue that Silesaurus opolensis is more of an early relative of dinosaurs than a true dinosaur. This reptile had an unusual appearance compared to the better known