Snout-tail length 305 mm

Its diet consisted mainly of large fish

Fossil nests and the posture of adults on eggs have provided a crucial connection between dinosaurs and modern birds

suggesting that it could move quickly and efficiently

Andrewsarchus mongoliensis is an ancient and enigmatic carnivorous mammal that lived in what is now Asia during the Eocene period

Irritator challengeri Seymouria Snout-tail length 305 mmIrritator 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