Bearing a large bony frill and three horns on the skull, and its large four-legged body possessing similarities with the modern rhinoceros, "Triceratops" is one of the most recognizable of all dinosaurs and the best-known ceratopsid. It was also one of the largest, up to long and in weight. It shared the landscape with and was probably preyed upon by "Tyrannosaurus", though it is less certain that the two did battle in the fanciful manner often depicted in museum displays and popular images. The functions of the frills and three distinctive facial horns on its head have long inspired debate. Traditionally, these have been viewed as defensive weapons against predators. More recent interpretations find it probable that these features were primarily used in species identification, courtship and dominance display, much like the antlers and horns of modern ungulates.