Triceratops is a genus of large ceratopsian (horned and frilled herbivorous dinosaur) that lived in North America; it was one of the most abundant animals about 68-65 million years ago, during the end of the Late Cretaceous period. Three species are currently known, the largest being Triceratops (Eotriceratops according to some scientists) xerinsularis, Triceratops horridus which is the most common, and Triceratops prorsus.
It lived alongside with Tyrannosaurus rex and was among its main prey. However, unlike other dinosaurs that relied on speed to escape this fearsome predator, Triceratops was well equipped to face with T. rex and even, to fight it off.
Armed with one meter long horns (probably even longer with their protective, sharp sheats that don't fossilize), and a parrot like beak with an incredibly strong bite force, Triceratops is often regarded as being one of the most dangerous herbivorous dinosaurs in Jurassic Park and also, in real life. It could measure up to 9–10 meters long and weigh 6-12 tons, being larger than an elephant and heavier than an average T. rex. In 2009 researchers under supervision of Jack Horner argued that Triceratops was actually a juvenile version of Torosaurus. The massive frill of Triceratops would grow longer and thinner in time, until it may have had the same holes as seen in Torosaurus.
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