it has provided important insights into the morphology and defensive adaptations of early ankylosaurs

La extinción del Mammuthus columbi coincide con el final del Pleistoceno

Its legs were robust and relatively long

approximately 73 to 65 million years ago

Irritator challengeri cretácico it has provided important insightsIrritator challengeri is a genus of spinosaurid theropod dinosaur that lived during the Early Cretaceous Period, approximately 110 million years ago, in what is now Brazil. Its name comes from the Latin "irritator", in reference to the frustration of paleontologists upon discovering that the original fossil had been altered with plaster by the collectors who found it, and "challengeri" in honor of Professor Challenger, a fictional character created by