and its extinction coincides with the arrival of the first humans in Australia

which could have been used for display or as a sign of dominance among its species

One of the most striking features of Amargasaurus cazaui is its double row of tall neural spines that extend along its neck and part of its back

Arthropleura eran herbívoros y se alimentaban de plantas y materia vegetal en descomposición

Archeopteryx is one of the most important fossils in evolutionary history

Miragaia longicollum Giganotosaurus and its extinction coincides withMiragaia longicollum is a genus of stegosaurid dinosaur that inhabited the Upper Jurassic, approximately 150 million years ago, in what is now Portugal. It is mainly notable for its extremely long neck, unusual in stegosaurs, which is often compared to that of some sauropods, the large long necked dinosaurs. This anatomical feature allows Miragaia to occupy a different ecological niche than other stegosaurs. Anatomical and Morphological