Extinct Era on Instagram: "Cryolophosaurus, with its unusual crest, lived in Antarctica about 190 million years ago and stands out as one of the earliest large theropods ever discovered. There is no fossil evidence to support dramatic behaviors such as males killing rivals for mates or destroying broods. The crest was most likely used for visual display, but exactly how they courted or competed remains unknown. What is certain is that Cryolophosaurus thrived in a polar landscape that was much wa