Microraptor, a four-winged dinosaur, likely had asymmetrical feathers, suggesting it was capable of controlled flight. elaborate
Pachycephalosaurus's skull was up to 10 inches thick, but scientists still debate exactly how it was used – whether for head-butting, or perhaps more for flank-butting or display. elaborate
Mamenchisaurus had one of the longest necks of any known dinosaur, proportionally longer than even the giraffe's. elaborate
Compsognathus is one of the smallest known dinosaurs, about the size of a chicken. elaborate
Spinosaurus had a sail on its back, possibly used for display, thermoregulation, or both. elaborate